https://www.flatcar.org/ Flatcar :: beta 2026-03-09T16:26:26.866843+00:00 Flatcar Container Linux maintainers@flatcar-linux.org python-feedgen https://www.flatcar.org/media/brand-logo.svg Flatcar Container Linux release feed https://github.com/flatcar/scripts/releases/tag/beta-4593.1.0 4593.1.0 2026-03-09T16:26:28.474787+00:00 Changes since Beta 4547.1.0

Security fixes:

Bug fixes:

  • Enabled back PAM sssd support for LDAP authentication (scripts#3696)

Changes:

  • Enabled netkit module (scripts#3524)
  • Function tracer (ftrace) enabled in ARM64 builds. (Enables CONFIG_FUNCTION_TRACER & CONFIG_DYNAMIC_FTRACE for observability and security tools) (flatcar/scripts#3685)

Updates:

Packages:

  • containerd 2.1.5
  • docker 28.0.4
  • ignition 2.24.0
  • kernel 6.12.74
  • systemd 257

Architectures:

  • amd64
  • arm64
]]> 2026-03-09T13:30:26+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4547.1.0 4547.1.0 2026-03-09T16:26:28.441963+00:00 Changes since Beta 4515.1.0

Security fixes:

Bug fixes:

  • Dropped debug symbols from containerd, incus, and overlaybd system extensions to reduce download size.

Changes:

  • Dropped Ciphers, MACs, and KexAlgorithms from the sshd configuration so that the OpenSSH upstream defaults are used. This introduces post-quantum key exchange algorithms for better security. (Flatcar#1921). Users requiring legacy Ciphers, MACs, and/or KexAlgos can override / re-enable this by deploying a custom drop-in config to /etc/ssh/sshd_config.d/.
  • /etc/shadow, /etc/gshadow are now owned by the shadow group, /usr/bin/unix_chkpwd, /usr/bin/chage and /usr/bin/expiry are now also owned by the shadow group with a sticky bit enabled.

Updates:

Packages:

  • containerd 2.1.5
  • docker 28.0.4
  • ignition 2.24.0
  • kernel 6.12.66
  • systemd 257

Architectures:

  • amd64
  • arm64
]]> 2026-01-27T14:42:03+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4515.1.0 4515.1.0 2026-03-09T16:26:28.406109+00:00 Changes since Alpha 4515.0.1

Security fixes:

Updates:

Changes since Beta 4459.1.2

Security fixes:

Bug fixes:

  • Alpha only: Added Fusion SCSI disk drivers back to the initrd after they got lost in the rework (Flatcar#1924)
  • Alpha only: Fixed systemd-sysext payload handling for air-gapped/self-hosted updates which was a known bug for 4487.0.0 (ue-rs#93)
  • Configured the services in the overlaybd sysext to start automatically like the other sysexts. Note that the sysext must be enabled at boot time for this to happen, otherwise you need to call systemd-tmpfiles --create and systemctl daemon-reload first.
  • Fixed SSSD startup failure by adding back LDB modules into the image, which got lost after a Samba update (Flatcar#1919)
  • Fixed a kernel boot warning when loading an explicit list of kernel modules in the minimal first-stage initrd (Flatcar#1934)

Changes:

  • Added support for the kernel cmdline parameters flatcar.release_file_server_url and flatcar.dev_file_server_url to specify custom servers where Flatcar extensions should be downloaded on boot (bootengine#112)
  • Alpha only: Reduced Azure image size again to 30 GB as before by shrinking the root partition to compensate for the growth of the other partitions (scripts#3460)
  • Increased all partition sizes: /boot to 1 GB, the two /usr partitions to 2 GB, /oem to 1 GB so that we can use more space in a few years when we can assume that most nodes run the new partition layout - existing nodes can still update for the next years (scripts#3027)
  • Reduced the kernel+initrd size on /boot by half. Flatcar now uses a minimal first stage initrd just to access the /usr partition and then switches to the full initrd that does the full system preparation as before. Since this means that the set of kernel modules available in the first initrd is reduced, please report any impact.
  • The way that files for building custom kernel modules are installed has changed from a Ubuntu-inspired method to the standard upstream kernel method. In the unlikely event that this breaks your module builds, please let the Flatcar team know immediately.

Updates:

Packages:

  • containerd 2.1.5
  • docker 28.0.4
  • ignition 2.22.0
  • kernel 6.12.61
  • systemd 257

Architectures:

  • amd64
  • arm64
]]> 2025-12-18T15:18:34+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4459.1.2 4459.1.2 2026-03-09T16:26:28.389627+00:00 Changes since Beta 4459.1.1

Security fixes:

Bug fixes:

  • Fixed the loading of kernel modules from system extensions via udev (e.g. at boot time).(flatcar/scripts#3367)

Changes:

Updates:

Packages:

  • containerd 2.0.7
  • docker 28.0.4
  • ignition 2.22.0
  • kernel 6.12.58
  • systemd 256

Architectures:

  • amd64
  • arm64
]]> 2025-11-27T11:34:35+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4459.1.1 4459.1.1 2026-03-09T16:26:28.380033+00:00 Changes since Beta 4459.1.0

Security fixes:

Bug fixes:

  • Enabled CONFIG_MEMCG_V1 to mitigate cgroupsv1 removal (e.g JVM) (Flatcar#1884)
  • Excluded TUN/TAP interfaces from the default DHCP network configuration to solve conflicts with the programs that created them (Flatcar#1933)
  • Fixed Intel microcode updates which were broken in recent Alpha and Beta releases by switching back to built-in extra firmware instead of early cpio inclusion (Flatcar#1909)
  • Fixed that the needed Flatcar extensions don't get removed on update which caused a re-download (update_engine#51)

Changes:

  • Scaleway: The Linux console is now attached to the correct console port. (scripts#3383)

Updates:

Packages:

  • containerd 2.0.7
  • docker 28.0.4
  • ignition 2.22.0
  • kernel 6.12.54
  • systemd 256

Architectures:

  • amd64
  • arm64
]]> 2025-11-12T15:00:28+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4459.1.0 4459.1.0 2026-03-09T16:26:28.344353+00:00 Changes since Beta 4426.1.0

Security fixes:

Bug fixes:

  • Fixed the QEMU launcher script to include HVF acceleration on arm64-based Macs for faster performance (Flatcar#1901)

Changes:

  • Enable CONFIG_INET_DIAG_DESTROY in kernel options (flatcar/scripts#3176)
  • Hyper-V images now use a systemd-sysext image for layering additional platform-specific software on top of /usr
  • Scaleway: SSH keys are now fetched via Afterburn (scripts#3277)
  • Scaleway: The hostname is now set via Afterburn (scripts#3277)

Updates:

Changes since Alpha 4459.0.0

Security fixes:

Bug fixes:

  • Fixed the QEMU launcher script to include HVF acceleration on arm64-based Macs for faster performance (Flatcar#1901)

Changes:

  • Scaleway: SSH keys are now fetched via Afterburn (scripts#3277)
  • Scaleway: The hostname is now set via Afterburn (scripts#3277)

Updates:

Packages:

  • containerd 2.0.5
  • docker 28.0.4
  • ignition 2.22.0
  • kernel 6.12.51
  • systemd 256

Architectures:

  • amd64
  • arm64
]]> 2025-10-14T12:34:34+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4426.1.0 4426.1.0 2026-03-09T16:26:28.279722+00:00 Changes since Beta 4372.1.0

Security fixes:

Bug fixes:

  • Enabled CONFIG_CPUSETS_V1 to mitigate cgroupsv1 removal (e.g JVM) (Flatcar#1884)
  • Fixed a UID/GID mis-alignment for user/group messagebus between acct-user/acct-group and baselayout. (baselayout#36)
  • Reenabled console support for DRM drivers, so that with the virtio graphics driver the interactive console is shown again after boot (Flatcar#1834)
  • sysext-podman: removed /etc/subuid and /etc/subgid generation for core user, before this change it partially overwrites the file and causes issues. (Flatcar#1733) This could be created through initial provisioning. (scripts#3043)

Changes:

Updates:

Changes since Alpha 4426.0.0

Security fixes:

Bug fixes:

  • Enabled CONFIG_CPUSETS_V1 to mitigate cgroupsv1 removal (e.g JVM) (Flatcar#1884)

Updates:

Packages:

  • containerd 2.0.5
  • docker 28.0.4
  • ignition 2.21.0
  • kernel 6.12.47
  • systemd 256

Architectures:

  • amd64
  • arm64
]]> 2025-09-15T14:01:56+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4372.1.0 4372.1.0 2026-03-09T16:26:28.222941+00:00 Changes since Beta 4344.1.1

Security fixes:

Updates:

Changes since Alpha 4372.0.1

Security fixes:

Updates:

Packages:

  • containerd 2.0.4
  • docker 28.0.1
  • ignition 2.21.0
  • kernel 6.12.40
  • systemd 256

Architectures:

  • amd64
  • arm64
]]> 2025-08-19T13:09:33+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4344.1.1 4344.1.1 2026-03-09T16:26:28.203988+00:00 Changes since Beta 4344.1.0

Security fixes:

Changes:

Updates:

Packages:

  • containerd 2.0.4
  • docker 28.0.1
  • ignition 2.21.0
  • kernel 6.12.35
  • systemd 256

Architectures:

  • amd64
  • arm64
]]> 2025-07-08T15:20:14+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4344.1.0 4344.1.0 2026-03-09T16:26:28.157100+00:00 Changes since Beta 4230.1.1

Security fixes:

Bug fixes:

  • Added back some BCC tools (scripts#2900)
  • Fix non-conforming GPT partition table (flatcar/Flatcar#1651)
  • Fixed path handling in the QEMU .sh launcher scripts. Given paths now are relative to the current directory and absolute paths work as you would expect.
  • Fixed race condition in the script that grows the root partition to fill the disk. This bug sometimes caused the operation to not occur. (init#132)
  • Fixed the inclusion of Intel and AMD CPU microcode in the initrd. This was accidentally dropped some time ago.
  • azure: Fixed issue of wa-linux-agent overriding ssh public key from ignition configuration during provisioning (flatcar/Flatcar#1661)
  • update-ssh-keys: More intuitive --help text and the -n (no-replace) option has been fixed. (flatcar/Flatcar#1554)

Changes:

  • Add changes for our secureboot signed images with our signed release process until the official shim signing (scripts#2754)
  • Added nftables-load.service and nftables-store.service services to load/store rules from/in /var/lib/nftables/rules-save (Flatcar#900)
  • Added support for podman in toolbox (toolbox#11)
  • Allow per-sysext USE flags and architecture-specific sysexts. (scripts#2798)
  • Always truncate hostnames on the first occurrence of . (cloud-init#32)
  • Build Intel iGPU i915 driver as module (scripts#2349)
  • Compile OS-dependent NVIDIA kernel module sysexts signed for secure boot. (scripts#2798)
  • Enabled EROFS module with XATTR support (Flatcar#1659)
  • Enabled virtiofs and fuse-dax modules in the kernel for advaned Qemu usecases. Thank you @aaronk6! (Flatcar#2825)
  • Ensure hostnames never exceeds 63 characters, regardless of the metadata provider (cloud-init#31)
  • Provided an Incus Flatcar extension as optional systemd-sysext image with the release. Write 'incus' to /etc/flatcar/enabled-sysext.conf through Ignition and the sysext will be installed during provisioning. (scripts#1655)
  • Sign out-of-tree kernel modules using the ephemeral signing key so that ZFS and NVIDIA sysexts can work with secure boot. (scripts#2636)
  • The kernel image and its embedded initrd are now compressed with xz rather than zstd. This gives greater compression at the cost of decompression performance. Systems may therefore now be ever so slightly slower to boot, but this was necessary to avoid running out of space in the /boot partition. Further measures to address the space issue are planned, and perhaps we can switch back to zstd in a later release.
  • The qemu script (flatcar_production_qemu*.sh) received two new options. -D (or -image-disk-opts) can be used to add extra options to the virtio-blk-pci device for primary disk. -d (or -disk) can be used to add extra disks to the machine - this one takes a path to a raw or qcow2 image file and, after a comma, virtio-blk-pci options. To learn what disk options can be passed to -D or -d, call qemu-system-x86_64 -device virtio-blk-pci,help (qemu-system-aarch64 can be used too).
  • /boot is now only accessible by the root user for better security. (Flatcar#296)
  • sysext-incus: removed /etc/subuid and /etc/subgid generation for root user, it has to be created through initial provisioning. (scripts#3028)
  • systemd now uses OpenSSL instead of gcrypt for cryptography to reduce the size of the initrd. This change disables systemd-journal's Forward Secure Sealing feature, but it is generally not useful for Flatcar.

Updates:

Changes since Alpha 4344.0.0

Security fixes:

Bug fixes:

  • Fixed race condition in the script that grows the root partition to fill the disk. This bug sometimes caused the operation to not occur. (init#132)

Changes:

  • Added support for podman in toolbox (toolbox#11)
  • /boot is now only accessible by the root user for better security. (Flatcar#296)
  • sysext-incus: removed /etc/subuid and /etc/subgid generation for root user, it has to be created through initial provisioning. (scripts#3028)

Updates:

Packages:

  • containerd 2.0.4
  • docker 28.0.1
  • ignition 2.21.0
  • kernel 6.12.34
  • systemd 256

Architectures:

  • amd64
  • arm64
]]> 2025-06-24T11:56:49+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4230.1.1 4230.1.1 2026-03-09T16:26:28.126243+00:00 Changes since Beta 4230.1.0

Security fixes:

Bug fixes:

  • Fixed PXE boot failures that arose since upgrading to systemd v256. Users were dumped to an emergency shell. (flatcar/bootengine#103)

Updates:

Packages:

  • containerd 1.7.23
  • docker 27.3.1
  • ignition 2.20.0
  • kernel 6.6.88
  • systemd 256

Architectures:

  • amd64
  • arm64
]]> 2025-05-06T11:35:29+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4230.1.0 4230.1.0 2026-03-09T16:26:28.102127+00:00 Changes since Beta 4186.1.1

Security fixes:

Bug fixes:

  • azure: Fix issue of wa-linux-agent overriding ssh public key from ignition configuration during provisioning (flatcar/Flatcar#1661)
  • Fix update-ca-certificates behavior when concatenating certificates with missing trailing newlines. (flatcar/scripts#2667)
  • Fixed creating netdev arguments to correctly include commas when no port forwards are passed (flatcar/scripts#2581)
  • The kernel module build directory now contains native binaries in arm64 images instead of the previous amd64 binaries (scripts#2694)
  • Nvidia driver installer service now supports the 570 driver branch by forcing the use of the proprietary kernel module. The 570 branch defaults to the kernel-open driver which requires loading firmware, which is not yet supported on Flatcar. (scripts#2694)

Changes:

  • Added support for ARM64 architecture in the NVIDIA driver installer service (scripts#2694)
  • Added new image signing pub key to flatcar-install, needed for download verification of releases built from March 2025 onwards, if you have copies of flatcar-install or the image signing pub key, you need to update them as well (init#129)
  • Added support for multiple port forwarding parameters in the QEMU startup script. Users can now specify multiple port forwards using the -f option. (flatcar/scripts#2575)

Updates:

Changes since Alpha 4230.0.1

Security fixes:

Bug fixes:

  • azure: Fix issue of wa-linux-agent overriding ssh public key from ignition configuration during provisioning (flatcar/Flatcar#1661)
  • Fix update-ca-certificates behavior when concatenating certificates with missing trailing newlines. (flatcar/scripts#2667)
  • The kernel module build directory now contains native binaries in arm64 images instead of the previous amd64 binaries (scripts#2694)
  • Nvidia driver installer service now supports the 570 driver branch by forcing the use of the proprietary kernel module. The 570 branch defaults to the kernel-open driver which requires loading firmware, which is not yet supported on Flatcar. (scripts#2694)

Changes:

  • Added support for ARM64 architecture in the NVIDIA driver installer service (scripts#2694)
  • Added new image signing pub key to flatcar-install, needed for download verification of releases built from March 2025 onwards, if you have copies of flatcar-install or the image signing pub key, you need to update them as well (init#129)

Updates:

Packages:

  • containerd 1.7.23
  • docker 27.3.1
  • ignition 2.20.0
  • kernel 6.6.83
  • systemd 256

Architectures:

  • amd64
  • arm64
]]> 2025-03-20T14:05:38+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4186.1.1 4186.1.1 2026-03-09T16:26:28.090098+00:00 Changes since Beta 4186.1.0

Security fixes:

Updates:

  • openssh(9.8_p1-r4)

Packages:

  • containerd 1.7.23
  • docker 27.3.1
  • ignition 2.20.0
  • kernel 6.6.74
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2025-02-18T15:12:26+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4186.1.0 4186.1.0 2026-03-09T16:26:28.051393+00:00 Changes since Beta 4152.1.0

Security fixes:

Changes:

  • Additional GRUB modules are no longer installed for UEFI platforms to save space and also because they cannot be loaded with Secure Boot enabled. This does not affect existing installations.
  • The GRUB modules on non-UEFI platforms are now compressed with xz rather than gzip to save even more space. This does not affect existing installations.
  • The VFIO kernel modules are now also available in ARM64 builds. (flatcar/scripts#2484)- Enabled the gtp kernel module. This is the GPRS Tunneling Protocol datapath for usage in telecoms scenarios. (flatcar/scripts#2504)

Updates:

Changes since Alpha 4186.0.0

Security fixes:

Updates:

Packages:

  • containerd 1.7.23
  • docker 27.3.1
  • ignition 2.20.0
  • kernel 6.6.74
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2025-01-30T16:23:38+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4152.1.0 4152.1.0 2026-03-09T16:26:28.009902+00:00 Changes since Beta 4116.1.0

Security fixes:

Bug fixes:

Changes:

  • Added Proxmox Virtual Environment images (scripts#1783)
  • The UEFI firmware has changed from raw (.fd) format to QCOW2 format. In addition, the amd64 firmware variables are now held in a 4MB image rather than a 2MB image. Note that this firmware is only intended for testing with QEMU. Do not use it in production. (scripts#2434)
  • The arm64 UEFI firmware now supports Secure Boot. Be aware that this is not considered secure due to the lack of an SMM implementation, which is needed to protect the variable store. As above, this firmware should not be used in production anyway. (scripts#2434)
  • grub 2.12-flatcar3: GRUB now includes many patches from Red Hat to support Secure Boot, as well as Flatcar's own patches. The version string includes a numbered "flatcar" suffix to track changes to these additional patches. This string can be seen in the GRUB menu. (scripts#2431)

Updates:

Changes since Alpha 4152.0.0

Security fixes:

Bug fixes:

Updates:

Packages:

  • containerd 1.7.23
  • docker 27.2.1
  • ignition 2.20.0
  • kernel 6.6.65
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2024-12-16T14:12:13+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4116.1.0 4116.1.0 2026-03-09T16:26:27.953874+00:00 Changes since Beta 4081.1.0

Security fixes:

Changes:

  • Kernel lockdown in integrity mode is now enabled when secure boot is enabled. This prevents loading unsigned kernel modules and matches the behavior of all major distros. (scripts#2299)
  • The /usr/sbin directory is now merged into /usr/bin, so the former became a symlink to the latter. The SDK now has the same base layout as the generic images. (flatcar/scripts#2068)
  • Disable CONFIG_NFS_V4_2_READ_PLUS kernel config to fix nfs-ganesha (flatcar/scripts#2390)

Updates:

Changes since Alpha 4116.0.0

Security fixes:

Changes:

Updates:

Packages:

  • containerd 1.7.22
  • docker 27.2.1
  • ignition 2.19.0
  • kernel 6.6.60
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2024-11-13T12:28:50+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4081.1.0 4081.1.0 2026-03-09T16:26:27.911161+00:00 Changes since Beta 4054.1.0

Security fixes:

Bug fixes:

  • CloudSigma: Disabled the new DHCP RapidCommit feature which is enabled by default since systemd 255. CloudSigma provides an incompatible implementation which results in cloud-init not being applied as no IP is issued. See: (flatcar/scripts#2016)
  • Fixed the initrd option in the QEMU launcher script. It was -R, but this was already taken by the read-only pflash option, so use -r instead. (scripts#2239)
  • Equinix Metal: fixed race condition on 'mount' Ignition stage (scripts#2308)
  • Fixed slow boots PXE and ISO boots caused by the decrypt-root.service. (Flatcar#1514)

Changes:

  • Azure, HyperV: Added daemons kvp, vss, and fcopy for better HyperV hypervisor integration with Flatcar guests (scripts#2309).
  • Enable mpi3mr kernel module for Broadcom Storage/RAID-Controllers (flatcar/scripts#2355)
  • Replace nmap netcat with openbsd variant. The license didn't get an exception from CNCF. Something about the definition of "derivative works" being too broad.
  • The docker build command will now use buildx as its backend as the old one became deprecated and a loud "DEPRECATED" information is printed every time it's used.

Updates:

Changes since Alpha 4081.0.0

Security fixes:

Bug fixes:

  • CloudSigma: Disabled the new DHCP RapidCommit feature which is enabled by default since systemd 255. CloudSigma provides an incompatible implementation which results in cloud-init not being applied as no IP is issued. See: (flatcar/scripts#2016)
  • Equinix Metal: fixed race condition on 'mount' Ignition stage (scripts#2308)

Changes:

  • Azure, HyperV: Added daemons kvp, vss, and fcopy for better HyperV hypervisor integration with Flatcar guests (scripts#2309).
  • Enable mpi3mr kernel module for Broadcom Storage/RAID-Controllers (flatcar/scripts#2355)

Updates:

Packages:

  • containerd 1.7.21
  • docker 26.1.0
  • ignition 2.19.0
  • kernel 6.6.54
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2024-10-10T12:24:32+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4054.1.0 4054.1.0 2026-03-09T16:26:27.867421+00:00 Changes since Beta 4012.1.0

Security fixes:

Bug fixes:

  • Fix ownership of systemd units shipped with built-in docker/containerd sysexts. The files shipped on production images were accidentally owned by 1000:1000 instead of 0:0. This uid/gid is not present on Flatcar images but would be assigned to the first created user. Due to contents of sysexts and /usr being readonly on Flatcar, the invalid permissions can't be used to escalate privileges. (scripts#2266)
  • Fixed bad usage of gpg that prevented flatcar-install from being used with custom signing keys (Flatcar#1471)
  • Equinix Metal: Fixed oem-cloudinit.service. The availability check now uses the https://metadata.platformequinix.com/metadata endpoint. (scripts#2222)

Changes:

  • As part of the update to Catalyst 4 (used to build the SDK), the coreos package repository has been renamed to coreos-overlay to match its directory name. This will be reflected in package listings and package manager output. (flatcar/scripts#2115)
  • The kernel security module Landlock is now enabled for programs to sandbox themselves (flatcar/scripts#2158)

Updates:

Changes since Alpha 4054.0.0

Security fixes:

Bug fixes:

  • Fix ownership of systemd units shipped with built-in docker/containerd sysexts. The files shipped on production images were accidentally owned by 1000:1000 instead of 0:0. This uid/gid is not present on Flatcar images but would be assigned to the first created user. Due to contents of sysexts and /usr being readonly on Flatcar, the invalid permissions can't be used to escalate privileges. (scripts#2266)
  • Equinix Metal: Fixed oem-cloudinit.service. The availability check now uses the https://metadata.platformequinix.com/metadata endpoint. (scripts#2222)

Updates:

Packages:

  • containerd 1.7.20
  • docker 26.1.0
  • ignition 2.19.0
  • kernel 6.6.48
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2024-09-05T11:38:16+00:00 https://github.com/flatcar/scripts/releases/tag/beta-4012.1.0 4012.1.0 2026-03-09T16:26:27.804704+00:00 Changes since Beta 3975.1.1

Security fixes:
Bug fixes:
  • Hetzner: Fixed duplicated prefix in the Afterburn metadata (scripts#2141)
Changes:
  • Hetzner: Added COREOS_HETZNER_PRIVATE_IPV4_0 Afterburn attribute for Hetzner private IPs (scripts#2141)
  • Provided a Python Flatcar extension as optional systemd-sysext image with the release. Write 'python' to /etc/flatcar/enabled-sysext.conf through Ignition and the sysext will be installed during provisioning (scripts#1979)
  • Added Akamai / Linode images (scripts#1806)
  • Removed unused grub executable duplicate files and removed grub modules that are already assembled in the grub executable (scripts#1955).
  • libcrypt is now provided by the libxcrypt library instead of glibc. Glibc libcrypt was deprecated long time ago.
Updates:

Changes since Alpha 4012.0.1

Security fixes
Bug fixes:
  • Hetzner: Fixed duplicated prefix in the Afterburn metadata (scripts#2141)
Changes:
  • Hetzner: Added COREOS_HETZNER_PRIVATE_IPV4_0 Afterburn attribute for Hetzner private IPs (scripts#2141)
Updates:

Packages:

  • containerd 1.7.18
  • docker 24.0.9
  • ignition 2.19.0
  • kernel 6.6.43
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2024-08-07T10:55:03+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3975.1.1 3975.1.1 2026-03-09T16:26:27.783854+00:00 Changes since Beta 3975.1.0

Security fixes:

Updates:

Packages:

  • containerd 1.7.17
  • docker 24.0.9
  • ignition 2.18.0
  • kernel 6.6.36
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2024-07-02T13:35:08+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3975.1.0 3975.1.0 2026-03-09T16:26:27.776140+00:00 Changes since Beta 3941.1.0

Security fixes:

Bug fixes:

  • Fixed issue file generation from /etc/issue.d (scripts#2018)

Changes:

  • Added KubeVirt qcow2 image for amd64/arm64 (flatcar/scripts#1962)
  • Added azure-nvme-utils to the image, which is used by udev to create symlinks for NVMe disks on Azure v6 instances under /dev/disk/azure/. (scripts#1950)
  • Backported systemd-sysext mutable overlays functionality from yet-unreleased systemd v256. (flatcar/scripts#1753)
  • Provided a Podman Flatcar extension as optional systemd-sysext image with the release. Write 'podman' to /etc/flatcar/enabled-sysext.conf through Ignition and the sysext will be installed during provisioning (scripts#1964)
  • OpenStack: Changed metadata hostname source order. The service first tries with the config drive then fallback on the metadata service. (bootengine#96)

Updates:

Changes since Alpha 3975.0.0

Bug fixes:

  • Fixed issue file generation from /etc/issue.d (scripts#2018)

Changes:

  • OpenStack: Changed metadata hostname source order. The service first tries with the config drive then fallback on the metadata service. (bootengine#96)

Updates:

Packages:

  • containerd 1.7.17
  • docker 24.0.9
  • ignition 2.18.0
  • kernel 6.6.35
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2024-06-26T13:04:36+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3941.1.0 3941.1.0 2026-03-09T16:26:27.761647+00:00 Beta 3941.1.0

Changes since Beta 3913.1.0

Security fixes:

Bug fixes:

Changes:

  • Added zram-generator package to the image (scripts#1772)
  • Add Intel igc driver to support I225/I226 family NICs. (scripts#1786)
  • Added Hetzner images (scripts#1880)
  • Added Hyper-V VHDX image (scripts#1791)
  • Enabled amd-pstate,amd-pstate-epp cpufreq drivers for some AMD CPUs in the kernel. (scripts#1770)
  • Enabled ntpd by default on AWS & GCP, enabled chronyd by default on Azure. The native time sync source is used on each cloud. (scripts#1792)
  • Enabled the ptp_vmw module in the kernel.
  • Hyper-V images, both .vhd and .vhdx files are available as zip compressed, switching from bzip2 to a built-in available Windows compression - zip (scripts#1878)
  • OpenStack, Brightbox: Added the flatcar.autologin kernel cmdline parameter by default as the hypervisor manages access to the console (scripts#1866)
  • Removed actool from the image and acbuild from the SDK as these tools are deprecated and not used (scripts#1817)
  • Scaleway: images are now provided directly as .qcow2 to ease the import on Scaleway (scripts#1953)
  • Switched ptp_kvm from kernel builtin to module.
  • The default VM memory was bumped to 2 GB in the Qemu script and for VMware OVFs

Updates:

Changes since Alpha 3941.0.0

Security fixes:

Bug fixes:

Changes:

  • Added Hetzner images (scripts#1880)
  • Scaleway: images are now provided directly as .qcow2 to ease the import on Scaleway (scripts#1953)

Updates:

Packages:

  • containerd 1.7.15
  • docker 24.0.9
  • ignition 2.18.0
  • kernel 6.6.30
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2024-05-22T13:39:58+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3913.1.0 3913.1.0 2026-03-09T16:26:27.744159+00:00 Changes since Beta 3874.1.0

Security fixes:

Bug fixes:

  • Disabled user-configdrive.service on OpenStack when config drive is used, which caused the hostname to be overwritten. The coreos-cloudinit.service unit already runs on OpenStack if the system is not configured via ignition. (Flatcar#1385)
  • Fixed toolbox to prevent mounted ctr snapshots from being garbage-collected (toolbox#9)
  • Removed custom CloudSigma coreos-cloudinit service configuration since it will be called with the cloudsigma oem anyway. The restart of the service can also cause the serial port to be stuck in an nondeterministic state which breaks future runs.

Changes:

  • A new format qemu_uefi_secure is introduced to test Flatcar for SecureBoot-enabled features. The format will be later merged into qemu_uefi.
  • Added Ignition Clevis support for encrypted disks unlocked with a TPM2 device or a Tang server (scripts#1560)
  • Added Scaleway images (flatcar/scripts#1683)
  • Added support for unlocking the rootfs with a TPM set up by systemd-cryptenroll (bootengine#93)
  • Disabled real-time priority for multipathd as it prevents the cgroups2 cpu controller from working. (flatcar/scripts#1771)
  • Enabled the GRUB TPM2 module to measure the boot code path and files into PCR 8+9 in UEFI (scripts#1861)
  • Provided a ZFS-2.2.2 Flatcar extension as optional systemd-sysext image with the release. Write 'zfs' to /etc/flatcar/enabled-sysext.conf through Ignition and the sysext will be installed during provisioning. ZFS support is experimental and ZFS is not supported for the root partition. (flatcar/scripts#1742)
  • Removed Linux drivers for Mellanox Technologies Switch ASICs family and Spectrum/Spectrum-2/Spectrum-3/Spectrum-4 Ethernet Switch ASICs to reduce the initrd size on AMD64 by ~5MB (flatcar/scripts#1734). This change is part of the effort to reduce the initrd size (flatcar#1381).
  • Removed coreos-cloudinit support for automatic keys conversion (e.g reboot-strategy -> reboot_strategy) (scripts#1687)
  • SDK: Unified qemu image formats, so that the qemu_uefi build target provides the regular qemu and the qemu_uefi_secure artifacts (scripts#1847)

Updates:

Changes since Alpha 3913.0.0

Security fixes:

  • Downgraded xz-utils to 5.4.2 as precaution even though Flatcar is not affected of the SSH backdoor (CVE-2024-3094)

Bug fixes:

  • Disabled user-configdrive.service on OpenStack when config drive is used, which caused the hostname to be overwritten. The coreos-cloudinit.service unit already runs on OpenStack if the system is not configured via ignition. (Flatcar#1385)
  • Fixed toolbox to prevent mounted ctr snapshots from being garbage-collected (toolbox#9)

Changes:

  • Added support for unlocking the rootfs with a TPM set up by systemd-cryptenroll (bootengine#93)
  • Disabled real-time priority for multipathd as it prevents the cgroups2 cpu controller from working. (scripts#1771)
  • Enabled the GRUB TPM2 module to measure the boot code path and files into PCR 8+9 in UEFI (scripts#1861)
  • SDK: Unified qemu image formats, so that the qemu_uefi build target provides the regular qemu and the qemu_uefi_secure artifacts (scripts#1847)

Updates:

  • ca-certificates (3.99)

Packages:

  • containerd 1.7.13
  • docker 24.0.9
  • ignition 2.18.0
  • kernel 6.6.21
  • systemd 255

Architectures:

  • amd64
  • arm64
]]> 2024-04-16T11:56:20+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3874.1.0 3874.1.0 2026-03-09T16:26:27.730470+00:00 Changes since Beta 3850.1.0

Security fixes:

Bug fixes:

  • Fixed that systemd-sysext images can extend directories where Flatcar extensions are also shipping files, e.g., that the sysext-bakery Kubernetes extension works when OEM extensions are present (sysext-bakery#50)
  • Fixed kubevirt vm creation by ensuring that /dev/vhost-net exists (Flatcar#1336)
  • Resolved kmod static nodes creation in bootengine (bootengine#85)
  • Restored support for custom OEMs supplied in the PXE boot where /usr/share/oem brings the OEM partition contents (Flatcar#1376)

Updates:

Changes since Alpha 3874.0.0

Security fixes:

Bug fixes:

  • Fixed that systemd-sysext images can extend directories where Flatcar extensions are also shipping files, e.g., that the sysext-bakery Kubernetes extension works when OEM extensions are present (sysext-bakery#50)
  • Fixed kubevirt vm creation by ensuring that /dev/vhost-net exists (Flatcar#1336)
  • Resolved kmod static nodes creation in bootengine (bootengine#85)
  • Restored support for custom OEMs supplied in the PXE boot where /usr/share/oem brings the OEM partition contents (Flatcar#1376)

Updates:

Packages:

  • containerd 1.7.13
  • docker 24.0.9
  • ignition 2.15.0
  • kernel 6.6.21
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2024-03-20T09:23:40+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3850.1.0 3850.1.0 2026-03-09T16:26:27.696823+00:00 Changes since Beta 3815.1.0

Security fixes:

Bug fixes:

  • Added a workaround for old airgapped/proxied update-engine clients to be able to update to this release (Flatcar#1332, update_engine#38)
  • Fixed the handling of OEM update payloads in a Nebraska response with self-hosted packages (ue-rs#49)
  • Forwarded the proxy environment variables of update-engine.service to the postinstall script to support fetching OEM systemd-sysext payloads through a proxy (Flatcar#1326)

Changes:

  • Added a flatcar-update --oem-payloads <yes|no> flag to skip providing OEM payloads, e.g., for downgrades (init#114)
  • Update generation SLSA provenance info from v0.2 to v1.0.

Updates:

Changes since Alpha 3850.0.0

Security fixes:

Bug fixes:

  • Added a workaround for old airgapped/proxied update-engine clients to be able to update to this release (Flatcar#1332, update_engine#38)
  • Fixed the handling of OEM update payloads in a Nebraska response with self-hosted packages (ue-rs#49)
  • Forwarded the proxy environment variables of update-engine.service to the postinstall script to support fetching OEM systemd-sysext payloads through a proxy (Flatcar#1326)

Changes:

  • Added a flatcar-update --oem-payloads <yes|no> flag to skip providing OEM payloads, e.g., for downgrades (init#114)

Updates:

Packages:

  • containerd 1.7.13
  • docker 24.0.9
  • ignition 2.15.0
  • kernel 6.6.16
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2024-02-14T04:34:27+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3815.1.0 3815.1.0 2026-03-09T16:26:27.671705+00:00 Changes since Beta 3760.1.1

Security fixes:

Bug fixes:

  • AWS: Fixed the Amazon SSM agent that was crashing. (Flatcar#1307)
  • Fixed a bug resulting in coreos-cloudinit resetting the instance hostname to 'localhost' if no metadata could be found (coreos-cloudinit#25, Flatcar#1262), with contributions from MichaelEischer
  • Fixed supplying extension update payloads with a custom base URL in Nebraska (Flatcar#1281)
  • Set TTY used for fetching server_context to RAW mode before running cloudinit on cloudsigma (scripts#1280)

Changes:

  • Torcx, the mechanism to provide a custom Docker version, was replaced by systemd-sysext in the OS image. Learn more about sysext and how to customise OS images here and read the blogpost about the replacement here.
    • Torcx entered deprecation 2 years ago in favour of deploying plain Docker binaries (which is now also a legacy option because systemd-sysext offers a more robust and better structured way of customisation, including OS independent updates).
    • Torcx has been removed entirely; if you use Torcx to extend the Flatcar base OS image, please refer to our conversion script and to the sysext documentation mentioned above for migrating.
    • Consequently, update_engine will not perform torcx sanity checks post-update anymore.
    • Relevant changes: scripts#1216, update_engine#30, Mantle#466, Mantle#465.
  • cri-tools, runc, containerd, docker, and docker-cli are now built from Gentoo upstream ebuilds. Docker received a major version upgrade - it was updated to Docker 24 (from Docker 20; see "updates").
    • NOTE: The docker btrfs storage driver has been de-prioritised; BTRFS backed storage will now default to the overlay2 driver (changelog, upstream pr). Using the btrfs driver can still be enforced by creating a respective docker config at /etc/docker/daemon.json.
    • NOTE: If you are already using btrfs-backed Docker storage and are upgrading to this new version, Docker will automatically use the btrfs storage driver for backwards-compatibility with your deployment.
      • Docker will remove the btrfs driver entirely in a future version. Please consider migrating your deployments to the overlay2 driver.
  • GCP OEM images now use a systemd-sysext image for layering additional platform-specific software on top of /usr and being part of the OEM A/B updates (flatcar#1146)

Updates:

Changes since Alpha 3815.0.0

Security fixes:

Bug fixes:

  • AWS: Fixed the Amazon SSM agent that was crashing. (Flatcar#1307)
  • Fixed a bug resulting in coreos-cloudinit resetting the instance hostname to 'localhost' if no metadata could be found (coreos-cloudinit#25, Flatcar#1262), with contributions from MichaelEischer
  • Fixed supplying extension update payloads with a custom base URL in Nebraska (Flatcar#1281)

Updates:

Packages:

  • containerd 1.7.10
  • docker 24.0.6
  • ignition 2.15.0
  • kernel 6.1.73
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2024-01-18T15:14:38+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3760.1.1 3760.1.1 2026-03-09T16:26:27.661024+00:00 Changes since Beta 3760.1.0

Security fixes:

Bug fixes:

  • Deleted files in /etc that have a tmpfiles rule that normally would recreate them will now show up again through the /etc lowerdir (Flatcar#1265, bootengine#79)
  • Fixed the missing /etc/extensions/ symlinks for the inbuilt Docker/containerd systemd-sysext images on update from Beta 3760.1.0 (update_engine#32)
  • GCP: Fixed OS Login enabling (scripts#1445)

Changes:

  • linux kernel: added zstd support for squashfs kernel module (scripts#1297)

Updates:

Packages:

  • containerd 1.7.7
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 6.1.66
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-12-13T12:51:26+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3760.1.0 3760.1.0 2026-03-09T16:26:27.652557+00:00 ⚠️ From Alpha 3794.0.0 Torcx has been removed - please assert that you don't rely on specific Torcx mechanism but now use systemd-sysext. See here for more information.

Changes since Beta 3745.1.0

Security fixes:

Bug fixes:

  • Added AWS EKS support for versions 1.24-1.28. Fixed /usr/share/amazon/eks/download-kubelet.sh to include download paths for these versions. (scripts#1210)
  • Fixed iterating over the OEM update payload signatures which prevented the AWS OEM update to 3745.x.y (update-engine#31)
  • Fixed quotes handling for update-engine (Flatcar#1209)
  • Made sshkeys.service more robust to only run coreos-metadata-sshkeys@core.service when not masked and also retry on failure (init#112)

Changes:

  • Brightbox: The regular OpenStack image should now be used, it includes Afterburn for instance metadata attributes
  • OpenStack: An uncompressed image is provided for simpler import (since the images use qcow2 inline compression, there is no benefit in using the .gz or .bz2 images)

Updates:

Changes since Alpha 3760.0.0

Security fixes:

Bug fixes:

  • Fixed iterating over the OEM update payload signatures which prevented the AWS OEM update to 3745.x.y (update-engine#31)
  • Made sshkeys.service more robust to only run coreos-metadata-sshkeys@core.service when not masked and also retry on failure (init#112)

Changes:

  • Brightbox: The regular OpenStack image should now be used, it includes Afterburn for instance metadata attributes
  • OpenStack: An uncompressed image is provided for simpler import (since the images use qcow2 inline compression, there is no benefit in using the .gz or .bz2 images)

Updates:

Packages:

  • containerd 1.7.7
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 6.1.62
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-11-22T07:54:40+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3745.1.0 3745.1.0 2026-03-09T16:26:27.641187+00:00 Changes since Beta 3732.1.0

Security fixes:

Bug fixes:

  • Disabled systemd-networkd's RoutesToDNS setting by default to fix provisioning failures observed in VMs with multiple network interfaces on Azure (scripts#1206)
  • Fixed the postinstall hook failure when updating from Azure instances without OEM systemd-sysext images to Flatcar Alpha 3745.x.y (update_engine#29)

Changes:

  • AWS OEM images now use a systemd-sysext image for layering additional platform-specific software on top of /usr
  • Reworked the VMware OEM software to be shipped as A/B updated systemd-sysext image
  • SDK: Experimental support for prefix builds to create distro independent, portable, self-contained applications w/ all dependencies included. With contributions from chewi and HappyTobi.
  • Started shipping default ssh client and ssh daemon configs in /etc/ssh/ssh_config and /etc/ssh/sshd_config which include config snippets in /etc/ssh/ssh_config.d and /etc/ssh/sshd_config.d, respectively.
  • The open-vm-tools package in VMware OEM now comes with vmhgfs-fuse, udev rules, pam and vgauth
  • To make Kubernetes work by default, /usr/libexec/kubernetes/kubelet-plugins/volume/exec is now a symlink to the writable folder /var/kubernetes/kubelet-plugins/volume/exec (Flatcar#1193)

Updates:

Changes since Alpha 3745.0.0

Security fixes:

Bug fixes:

  • Disabled systemd-networkd's RoutesToDNS setting by default to fix provisioning failures observed in VMs with multiple network interfaces on Azure (scripts#1206)
  • Fixed the postinstall hook failure when updating from Azure instances without OEM systemd-sysext images to Flatcar Alpha 3745.x.y (update_engine#29)

Changes:

  • To make Kubernetes work by default, /usr/libexec/kubernetes/kubelet-plugins/volume/exec is now a symlink to the writable folder /var/kubernetes/kubelet-plugins/volume/exec (Flatcar#1193)

Updates:

Packages:

  • containerd 1.7.6
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 6.1.58
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-10-25T08:38:48+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3732.1.0 3732.1.0 2026-03-09T16:26:27.578447+00:00 Changes since Alpha 3732.0.0

Security fixes:

Bug fixes:

  • Triggered re-reading of partition table to fix adding partitions to the boot disk (scripts#1202)

Changes:

Updates:

Changes compared to Beta 3602.1.6

Security fixes:

Bug fixes:

  • Fix the RemainAfterExit clause in nvidia.service (Flatcar#1169)
  • Fixed bug in handling renamed network interfaces when generating login issue (init#102)
  • Triggered re-reading of partition table to fix adding partitions to the boot disk (scripts#1202)

Changes:

  • :warning: Dropped support for niftycloud and interoute. For interoute we haven't been generating the images for some time already. (scripts#971) :warning:
  • Added TLS Kernel module (scripts#865)
  • Added support for multipart MIME userdata in coreos-cloudinit. Ignition now detects multipart userdata and delegates execution to coreos-cloudinit. (scripts#873)
  • Azure and QEMU OEM images now use systemd-sysext images for layering additional platform-specific software on top of /usr. For Azure images this also means that the image has a normal Python installation available through the sysext image. The OEM software is still not updated but this will be added soon.
  • Change nvidia.service to type oneshot (from the default "simple") so the subsequent services (configured with "Requires/After") are executed after the driver installation is successfully finished (flatcar/Flatcar#1136)
  • Enabled the virtio GPU driver (scripts#830)
  • Migrate to Type=notify in containerd.service. Changed the unit to Type=notify, utilizing the existing containerd support for sd_notify call after socket setup.
  • Migrated the NVIDIA installer from the Azure/AWS OEM partition to /usr to make it available on all platforms (scripts#932, Flatcar#1077)
  • Moved a mountpoint of the OEM partition from /usr/share/oem to /oem. /usr/share/oem became a symlink to /oem for backward compatibility. Despite the move, the initrd images providing files through /usr/share/oem should keep using /usr/share/oem. The move was done to enable activating the OEM sysext images that are placed in the OEM partition.
  • OEM vendor tools are now A/B updated if they are shipped as systemd-sysext images, the migration happens when both partitions require a systemd-sysext OEM image - note that this will delete the nvidia.service from /etc on Azure because it's now part of /usr (Flatcar#60)
  • Updated locksmith to use non-deprecated resource control options in the systemd unit (Locksmith#20)
  • Use qcow2 compressed format instead of additional compression layer in Qemu images (Flatcar#1135, scripts#1132)

Updates:

Packages:

  • containerd 1.7.6
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 6.1.55
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-10-05T10:00:33+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3602.1.6 3602.1.6 2026-03-09T16:26:27.554960+00:00 Changes since Beta 3602.1.5

Changes:

  • Azure: Add support for Microsoft Azure Network Adapter (MANA) NICs on Azure (scripts#1131)

Updates:

Packages:

  • containerd 1.6.21
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 5.15.132
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-09-21T11:36:01+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3602.1.5 3602.1.5 2026-03-09T16:26:27.550341+00:00 Changes since Beta 3602.1.4

Security fixes:

Bug fixes:

  • Fixed the restart of Systemd services when the main process is being killed by a SIGHUP signal (flatcar#1157)

Updates:

Packages:

  • containerd 1.6.21
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 5.15.129
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-09-06T13:18:11+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3602.1.4 3602.1.4 2026-03-09T16:26:27.545126+00:00 Changes since Beta 3602.1.3

Security fixes:

Updates:

Packages:

  • containerd 1.6.21
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 5.15.124
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-08-09T11:43:20+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3602.1.3 3602.1.3 2026-03-09T16:26:27.541168+00:00 Changes since Beta 3602.1.2

Updates:

Packages:

  • containerd 1.6.21
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 5.15.120
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-07-18T08:59:31+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3602.1.2 3602.1.2 2026-03-09T16:26:27.536918+00:00 Changes since Beta 3602.1.1

Security fixes:

Bug fixes:

  • Ensured that the folder /var/log/sssd is created if it doesn't exist, required for sssd.service (Flatcar#1096)
  • Worked around a bash regression in flatcar-install and added error reporting for disk write failures (Flatcar#1059)

Changes:

  • Changed ext4 inode size of root partition to 256 bytes. This improves compatibility with applications and is necessary for 2038 readiness (Flatcar#1082)

Updates:

Packages:

  • containerd 1.6.21
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 5.15.119
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-07-06T12:15:43+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3602.1.1 3602.1.1 2026-03-09T16:26:27.532465+00:00 Changes since Beta 3602.1.0

Bug fixes:

  • Resolved the conflicting FD usage of libselinux and systemd which caused, e.g., a systemd crash on certain watchdog interaction during shutdown (patch in systemd 252.11)

Updates:

Packages:

  • containerd 1.6.21
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 5.15.117
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-06-21T12:17:56+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3602.1.0 3602.1.0 2026-03-09T16:26:27.524692+00:00 Changes since Beta 3572.1.0

Security fixes:

Bug fixes:

  • Restored the reboot warning and delay for non-SSH console sessions (locksmith#21)

Changes:

  • Changed coreos-cloudinit to now set the short hostname instead of the FQDN when fetched from the metadata service (coreos-cloudinit#19)

Updates:

Changes since Alpha 3602.0.0

Security fixes:

Bug fixes:

Changes:

Updates:

Packages:

  • containerd 1.6.21
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 5.15.113
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-06-01T11:51:22+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3572.1.0 3572.1.0 2026-03-09T16:26:27.515998+00:00 Changes since Beta 3549.1.1

Security fixes:

Bug fixes:

  • Fixed a miscompilation of getfacl causing it to dump core when executed (scripts#809)

Changes:

  • Improved the OS reset tool to offer preview, backup and restore (init#94)

Updates:

Changes since Alpha 3572.0.1

Security fixes:

Bug fixes:

  • Fixed a miscompilation of getfacl causing it to dump core when executed (scripts#809)

Updates:

Packages:

  • containerd 1.6.20
  • docker 20.10.24
  • ignition 2.15.0
  • kernel 5.15.111
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-05-16T10:20:20+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3549.1.1 3549.1.1 2026-03-09T16:26:27.508794+00:00 Changes since Beta 3549.1.0

Security fixes:

Bug fixes:

  • Fixed systemd journal logs persistency on the first boot (flatcar#1005)
  • Fixed the broken emerge-gitclone in the dev-container owing to the missing migration action around the unification of the Flatcar core repositories

Changes:

  • The package upgrade for nvidia-drivers might result in not supporting a few of the older NVIDIA Tesla GPUs. If you are facing issues, set NVIDIA_DRIVER_VERSION=460.106.00 in /etc/flatcar/nvidia-metadata

Updates:

Packages:

  • containerd 1.6.19
  • docker 20.10.23
  • ignition 2.15.0
  • kernel 5.15.108
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-04-25T13:37:33+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3549.1.0 3549.1.0 2026-03-09T16:26:27.493460+00:00 Changes since Beta 3510.1.0

Security fixes:

Bug fixes:

  • Ensured that /var/log/journal/ is created early enough for systemd-journald to persist the logs on first boot (bootengine#60, baselayout#29)
  • Fixed journalctl --user permission issue (Flatcar#989)
  • Restored the support to specify OEM partition files in Ignition when /usr/share/oem is given as initrd mount point (bootengine#58)

Changes:

  • Added a new flatcar-reset tool and boot logic for selective OS resets to reconfigure the system with Ignition while avoiding config drift (bootengine#55, init#91)
  • Added new image signing pub key to flatcar-install, needed for download verification of releases built from July 2023 onwards, if you have copies of flatcar-install or the image signing pub key, you need to update them as well (init#92)
  • Added pigz to the image, a parallel gzip implementation, which is useful to speed up the (de)compression for large container image imports/exports (coreos-overlay#2504)
  • Enabled elfutils support in systemd-coredump. A backtrace will now appear in the journal for any program that dumps core (coreos-overlay#2489)
  • /etc is now set up as overlayfs with the original /etc folder being the store for changed files/directories and /usr/share/flatcar/etc providing the lower default directory tree (bootengine#53, scripts#666)
  • On boot any files in /etc that are the same as provided by the booted /usr/share/flatcar/etc default for the overlay mount on /etc are deleted to ensure that future updates of /usr/share/flatcar/etc are propagated - to opt out create /etc/.no-dup-update in case you want to keep an unmodified config file as is or because you fear that a future Flatcar version may use the same file as you at which point your copy is cleaned up and any other future Flatcar changes would be applied (bootengine#54)
  • Specifying the OEM filesystem in Ignition to write files to /usr/share/oem is not needed anymore (bootengine#58)
  • Switched systemd log reporting to the combined format of both unit description, as before, and now the unit name to easily find the unit (coreos-overlay#2436)

Updates:

Changes since Alpha 3549.0.0

Security fixes:

Bug fixes:

  • Ensured that /var/log/journal/ is created early enough for systemd-journald to persist the logs on first boot (bootengine#60, baselayout#29)
  • Fixed journalctl --user permission issue (Flatcar#989)

Changes:

Updates:

Packages:

  • containerd 1.6.19
  • docker 20.10.23
  • ignition 2.15.0
  • kernel 5.15.106
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-04-17T13:18:23+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3510.1.0 3510.1.0 2026-03-09T16:26:27.480642+00:00 Changes since Beta 3493.1.0

Security fixes:

Bug fixes:

  • Excluded the special Kubernetes network interfaces nodelocaldns and kube-ipvs0 from being managed with systemd-networkd which interfered with the setup (init#89).

Updates:

Changes since Alpha 3510.0.0

Security fixes:

Bug fixes:

  • Excluded the special Kubernetes network interfaces nodelocaldns and kube-ipvs0 from being managed with systemd-networkd which interfered with the setup (init#89).

Updates:

Packages:

  • containerd 1.6.16
  • docker 20.10.23
  • ignition 2.14.0
  • kernel 5.15.98
  • systemd 252

Architectures:

  • amd64
  • arm64
]]> 2023-03-07T15:23:17+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3493.1.0 3493.1.0 2026-03-09T16:26:27.468776+00:00 Changes since Beta 3446.1.1

Security fixes:

Updates:

Changes since Alpha 3493.0.0

Security fixes:

Bug fixes:

Changes:

Updates:

Packages:

  • containerd 1.6.15
  • docker 20.10.22
  • ignition 2.14.0
  • kernel 5.15.92
  • systemd 251

Architectures:

  • amd64
  • arm64
]]> 2023-02-16T13:07:54+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3446.1.1 3446.1.1 2026-03-09T16:26:27.461347+00:00 Changes since Beta 3446.1.0

Security fixes:

Bug fixes:

  • Fixed a regression (in Alpha/Beta) where machines failed to boot if they didn't have the core user or group in /etc/passwd or /etc/group (baselayout#26)

Changes:

Updates:

Packages:

  • containerd 1.6.10
  • docker 20.10.21
  • ignition 2.14.0
  • kernel 5.15.89
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2023-01-24T13:16:19+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3446.1.0 3446.1.0 2026-03-09T16:26:27.454019+00:00 Changes since Beta 3432.1.0

Security fixes:

Bug fixes:

  • Added back Ignition support for Vagrant (coreos-overlay#2351)
  • The rootfs setup in the initrd now runs systemd-tmpfiles on every boot, not only when Ignition runs, to fix a dbus failure due to missing files (Flatcar#944)

Updates:

Changes since Alpha 3446.0.0

Security fixes:

Bug fixes:

  • Added back Ignition support for Vagrant (coreos-overlay#2351)
  • The rootfs setup in the initrd now runs systemd-tmpfiles on every boot, not only when Ignition runs, to fix a dbus failure due to missing files (Flatcar#944)

Updates:

Packages:

  • containerd 1.6.10
  • docker 20.10.21
  • ignition 2.14.0
  • kernel 5.15.86
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2023-01-11T13:32:59+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3432.1.0 3432.1.0 2026-03-09T16:26:27.445982+00:00 Changes since Beta 3417.1.0

Security fixes:

Bug fixes:

  • Added support for hardware security keys in update-ssh-keys (update-ssh-keys#7)
  • Fix "ext4 deadlock under heavy I/O load" kernel issue. The patch for this is included provisionally while we wait for it to be merged pstream (Flatcar#847, coreos-overlay#2315)

Updates:

Changes since Alpha 3432.0.0

Security fixes:

Bug fixes:

  • Fix "ext4 deadlock under heavy I/O load" kernel issue. The patch for this is included provisionally while we wait for it to be merged upstream (Flatcar#847, coreos-overlay#2315)

Updates:

Packages:

  • containerd 1.6.10
  • docker 20.10.21
  • ignition 2.14.0
  • kernel 5.15.81
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-12-09T09:47:46+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3417.1.0 3417.1.0 2026-03-09T16:26:27.437668+00:00 Changes since Beta 3402.1.0

Security fixes:

Bug fixes:

Changes:

  • Toolbox now uses containerd to download and mount the image (toolbox#7)

Updates:

Changes since Alpha 3417.0.0

Security fixes:

Bug fixes:

Updates:

Packages:

  • containerd 1.6.9
  • docker 20.10.21
  • ignition 2.14.0
  • kernel 5.15.79
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-11-24T15:10:53+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3402.1.0 3402.1.0 2026-03-09T16:26:27.423371+00:00 Changes since Beta 3374.1.1

Security fixes:

Bug fixes:

  • Enabled IOMMU on arm64 kernels, the lack of which prevented some systems from booting (coreos-overlay#2235)

Changes:

  • Added CONFIG_NF_CONNTRACK_BRIDGE (for nf_conntrack_bridge) and CONFIG_NFT_BRIDGE_META (for nft_meta_bridge) to the kernel config to allow using conntrack rules for bridges in nftables and to match on bridge interface names (coreos-overlay#2207)
  • Change CONFIG_WIREGUARD kernel option to module to save space on boot partition (coreos-overlay#2239)
  • Disable several arch specific arm64 kernel config options for unsupported platforms to save space on boot partition (coreos-overlay#2239)
  • Switched from --strip-unneeded to --strip-debug when installing kernel modules, which makes kernel stacktraces more accurate and makes debugging issues easier (coreos-overlay#2196)
  • The flatcar-update tool got two new flags to customize ports used on the host while updating flatcar (init#81)
  • Add qemu-guest-agent to all amd64 images, it will be automatically enabled when qemu-ga virtio-port is detected (coreos-overlay#2240, portage-stable#373)

Updates:

Changes since Alpha 3402.0.1

Security fixes:

Updates:

Packages:

  • containerd 1.6.8
  • docker 20.10.20
  • ignition 2.14.0
  • kernel 5.15.77
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-11-09T12:52:43+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3374.1.1 3374.1.1 2026-03-09T16:26:27.415885+00:00 Changes since Beta 3374.1.0

Security fixes:

Packages:

  • containerd 1.6.8
  • docker 20.10.18
  • ignition 2.14.0
  • kernel 5.15.74
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-11-01T13:15:45+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3374.1.0 3374.1.0 2026-03-09T16:26:27.408205+00:00 New Beta Release 3374.1.0

Changes since Beta 3346.1.0

Security fixes:

Changes:

Updates:

Changes since Alpha 3374.0.0

Security fixes:

Changes:

Updates:

Packages:

  • containerd 1.6.8
  • docker 20.10.18
  • ignition 2.14.0
  • kernel 5.15.74
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-10-26T09:26:18+00:00 https://github.com/flatcar/scripts/releases/tag/beta-3346.1.0 3346.1.0 2026-03-09T16:26:27.392515+00:00 Changes since Beta 3277.1.2

Security fixes:

Bug fixes:

  • Added back gettext to the OS (Flatcar#849)
  • Added merging of Ignition systemd duplicated units when auto-translating from Ignition 2 to Ignition 3. (coreos-overlay#2187)
  • Equinix Metal: Fixed serial console settings for the m3.small.x86 instance by expanding the GRUB check for i386 to x86_64 (coreos-overlay#2122)
  • Removed outdated LTS channel information printed on login (init#75)

Changes:

  • Added symlink from nc to ncat. -q option is not yet supported (flatcar#545)
  • emerge-gitclone: Migrate emerge-gitclone to use scripts repo tags and submodule refs

Updates:

Changes since Alpha 3346.0.0

Security fixes:

Bug fixes:

  • Added back gettext to the OS (Flatcar#849)
  • Added merging of Ignition systemd duplicated units when auto-translating from Ignition 2 to Ignition 3. (coreos-overlay#2187)
  • Equinix Metal: Fixed serial console settings for the m3.small.x86 instance by expanding the GRUB check for i386 to x86_64 (coreos-overlay#2122)

Changes:

  • emerge-gitclone: Migrate emerge-gitclone to use scripts repo tags and submodule refs

Updates:

Packages:

  • containerd 1.6.8
  • docker 20.10.17
  • ignition 2.14.0
  • kernel 5.15.70
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-10-04T12:19:52+00:00 https://github.com/kinvolk/manifest/releases/tag/v3277.1.2 3277.1.2 2026-03-09T16:26:27.383418+00:00 Changes since Beta 3277.1.1

Security fixes:

Bug fixes:

Changes:

  • The new image signing subkey was added to the public key embedded into flatcar-install (the old expired on 10th August 2022), only an updated flatcar-install script can verify releases signed with the new key (init#79)
  • AWS: Added AWS IMDSv2 support to coreos-cloudinit (flatcar-linux/coreos-cloudinit#13)

Updates:

Packages:

  • containerd 1.6.6
  • docker 20.10.17
  • ignition 2.14.0
  • kernel 5.15.63
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-09-01T13:01:56+00:00 https://github.com/kinvolk/manifest/releases/tag/v3277.1.1 3277.1.1 2026-03-09T16:26:27.378115+00:00 New Beta Release 3277.1.1

Changes since Beta 3277.1.0

Security fixes:

Bug fixes:

  • Added support for Openstack for cloud-init activation (flatcar-linux/init#76)
  • Excluded Wireguard interface from systemd-networkd default management (Flatcar#808)
  • Fixed /etc/resolv.conf symlink by pointing it at resolv.conf instead of stub-resolv.conf. This bug was present since the update to systemd v250 (coreos-overlay#2057)
  • Fixed excluded interface type from default systemd-networkd configuration (flatcar-linux/init#78)
  • Fixed space escaping in the networkd Ignition translation (Flatcar#812)

Changes:

Updates:

Packages:

  • containerd 1.6.6
  • docker 20.10.17
  • ignition 2.14.0
  • kernel 5.15.58
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-08-04T12:08:33+00:00 https://github.com/kinvolk/manifest/releases/tag/v3277.1.0 3277.1.0 2026-03-09T16:26:27.364371+00:00 New Beta Release 3277.1.0

Changes since Alpha 3277.0.0

Security fixes:

Bug fixes:

  • The Ignition v3 kargs directive failed before when used with the generic image where no grub.cfg exists, this was fixed by creating it first (bootengine#47)

Updates:

Changes since Beta 3227.1.1

Security fixes:

Bug fixes:

  • The Ignition v3 kargs directive failed before when used with the generic image where no grub.cfg exists, this was fixed by creating it first (bootengine#47)

Changes:

  • Added efibootmgr binary to the image (coreos-overlay#1955)
  • Added VMware networking configuration in the initramfs via guestinfo settings (bootengine#44, flatcar#717)
  • Enabled containerd.service unit, br_netfilter and overlay modules by default to follow Kubernetes requirements (coreos-overlay#1944, init#72)
  • flatcar-install: Added option to create UEFI boot entry (init#74)
  • VMWare: Added ignition-delete-config.service to remove Ignition config from VM metadata, see also here (coreos-overlay#1948)

Updates:

Packages:

  • containerd 1.6.6
  • docker 20.10.17
  • ignition 2.14.0
  • kernel 5.15.55
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-07-21T15:29:48+00:00 https://github.com/kinvolk/manifest/releases/tag/v3227.1.1 3227.1.1 2026-03-09T16:26:27.355257+00:00 New Beta Release 3227.1.1

Changes since Beta 3227.1.0

Security fixes:

Changes:

Updates:

Packages:

  • containerd 1.6.6
  • docker 20.10.14
  • ignition 2.13.0
  • kernel 5.15.48
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-06-23T11:46:15+00:00 https://github.com/kinvolk/manifest/releases/tag/v3227.1.0 3227.1.0 2026-03-09T16:26:27.343446+00:00 New Beta Release 3227.1.0

Changes since Beta 3185.1.1

Security fixes:

Bug fixes:

  • Ensured /etc/flatcar/update.conf exists because it happens to be used as flag file for Ansible (init#71)
  • Fixed Ignition's OEM ID to be metal to follow the Ignition upstream change which otherwise resulted in a broken boot when the Flatcar OEM ID pxe was used (bootengine#45)
  • Added networkd translation to files section when converting from Ignition 2.x to Ignition 3.x (coreos-overlay#1910, flatcar#741)
  • GCP: Fixed shutdown script execution (coreos-overlay#1912, flatcar#743)

Changes:

  • Enabled CONFIG_INTEL_RAPL on AMD64 Kernel config to compile intel_rapl_common module in order to allow power monitoring on modern Intel processors (flatcar#coreos-overlay#1801)

Updates:

Changes since Alpha 3227.0.0

Security fixes:

Bug fixes:

  • Ensured /etc/flatcar/update.conf exists because it happens to be used as flag file for Ansible (init#71)
  • Fixed Ignition's OEM ID to be metal to follow the Ignition upstream change which otherwise resulted in a broken boot when the Flatcar OEM ID pxe was used (bootengine#45)
  • Added networkd translation to files section when converting from Ignition 2.x to Ignition 3.x (coreos-overlay#1910, flatcar#741)
  • GCP: Fixed shutdown script execution (coreos-overlay#1912, flatcar#743)

Updates:

Packages:

  • docker 20.10.14
  • ignition 2.13.0
  • kernel 5.15.43
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-06-02T15:06:28+00:00 https://github.com/kinvolk/manifest/releases/tag/v3185.1.1 3185.1.1 2026-03-09T16:26:27.334003+00:00 New Beta Release 3185.1.1

Changes since Beta 3185.1.0

Security fixes:

Bug fixes:

  • GCE: Restored oem-gce.service functionality on GCP (coreos-overlay#1813)
  • Skipped starting ensure-sysext.service if systemd-sysext.service won't be started, to prevent reporting a dependency failure (Flatcar#710)
  • Added a remount action as systemd-sysext.service drop-in unit to restore the OEM partition mount after the overlay mounts in /usr are done (init#69)
  • Added pahole to developer container, without it kernel modules built against /usr/src/linux may fail to probe with an 'invalid relocation target' error (coreos-overlay#1839)

Changes:

  • GCE: Enabled GVE kernel driver, which adds support for Google Virtual NIC on GCP (coreos-overlay#1802)
  • Azure: Set up /etc/hostname from instance metadata with Afterburn
  • AWS EC2: Removed the setup of /etc/hostname from the instance metadata because it used a long FQDN but we can just use use the hostname set via DHCP (Flatcar#707)
  • SDK: Dropped the mantle binaries (kola, ore, etc.) from the SDK, they are now provided by the ghcr.io/flatcar/mantle image (coreos-overlay#1827, scripts#275)

Updates:

Packages:

  • docker 20.10.13
  • ignition 2.13.0
  • kernel 5.15.37
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-05-09T14:42:03+00:00 https://github.com/kinvolk/manifest/releases/tag/v3185.1.0 3185.1.0 2026-03-09T16:26:27.318035+00:00 New Beta Release 3185.1.0

Changes since Beta 3139.1.1

Security fixes:

Bug fixes:

  • AWS: specify correct console (ttyS0) on kernel command line for ARM64 instances (coreos-overlay#1628)
  • Made Ignition write the SSH keys into a file under authorized_keys.d/ignition again and added a call to update-ssh-keys after Ignition ran to create the merged authorized_keys file, which fixes the problem that keys added by Ignition get lost when update-ssh-keys runs (init#66)

Changes:

  • Added auditd.service but left it disabled by default, a custom configuration can be created by removing /etc/audit/auditd.conf and replacing it with an own file (coreos-overlay#1636)
  • The systemd-networkd ManageForeignRoutes and ManageForeignRoutingPolicyRules settings are now disabled through a drop-in file and thus can only be enabled again by a drop-in file under /etc/systemd/networkd.conf.d/ because drop-in files take precedence over /etc/systemd/networkd.conf (init#61)
  • Bring in dependencies for NFS4 with Kerberos both in kernel and userspace. Tested against NFS4.1 server. (coreos-overlay#1664)
  • Merge the Flatcar Pro features into the regular Flatcar images (coreos-overlay#1679)
  • Besides Ignition v1 and v2 configurations, Ignition configurations with specification v3 (up to 3.3.0) are now supported, see the docs section for details
  • Made SELinux enabled by default in default containerd configuration file. (coreos-overlay#1699)
  • Removed rngd.service because it is not essential anymore for the kernel to boot fast in VM environments (coreos-overlay#1700)
  • Enabled systemd-sysext.service to activate systemd-sysext images on boot, to disable you will need to mask it. Also added a helper service ensure-sysext.service which reloads the systemd units to reevaluate the sockets, timers, and multi-user targets when systemd-sysext.service is (re)started, making it possible to enable units that are part of a sysext image (coreos-overlay#65)
  • For amd64 /usr/lib used to be a symlink to /usr/lib64 but now they became two separate folders as common in other distributions (and was the case for arm64 already). Compatibility symlinks exist in case /usr/lib64 was used to access, e.g., the modules folder or the systemd folder (coreos-overlay#1713, scripts#255)
  • Enabled FIPS mode for cryptsetup (coreos-overlay#1747)
  • Added cryptsetup to the initramfs for the Ignition luks directive (flatcar-linux/coreos-overlay#1760)
  • Enabled FIPS mode for cryptsetup (portage-stable#312)
  • Defined a systemd-sysext level that sysext images can match for instead of the OS version when they don't have a strong coupling, meaning the only metadata required is SYSEXT_LEVEL=1.0 and ID=flatcar (Flatcar#643)
  • Azure: Azure VHD disks are now created using subformat=fixed, which makes them suitable for immediate upload to Azure using any tool.
  • DigitalOcean: In addition to the bz2 image, a gz compressed image is published. This helps against hitting the compression timeout that sometimes lets the image import fail.
  • OpenStack: In addition to the bz2 image, a gz compressed image is published. This allows Glance to directly consume the images by simply passing in the URL of the image.
  • SDK: The image compression format is now configurable. Supported formats are: bz2, gz, zip, none, zst. Selecting the image format can now be done by passing the --image_compression_formats option. This flag gets a comma separated list of formats.

Updates:

Changes since Alpha 3185.0.0

Security fixes:

Bug fixes:

  • Made Ignition write the SSH keys into a file under authorized_keys.d/ignition again and added a call to update-ssh-keys after Ignition ran to create the merged authorized_keys file, which fixes the problem that keys added by Ignition get lost when update-ssh-keys runs (init#66)

Changes:

Updates:

  • Linux (5.15.32) (from 5.15.30)
  • ca-certificates (3.77)

Packages:

  • docker 20.10.13
  • ignition 2.13.0
  • kernel 5.15.32
  • systemd 250

Architectures:

  • amd64
  • arm64
]]> 2022-04-07T12:04:52+00:00 https://github.com/kinvolk/manifest/releases/tag/v3139.1.1 3139.1.1 2026-03-09T16:26:27.307019+00:00 New Beta Release 3139.1.1

Changes since Beta-3139.1.0

Security fixes

Bug fixes

  • Reverted the Linux kernel commit which broke networking on AWS instances which use Intel 82559 NIC (c4/m4) (Flatcar#665, coreos-overlay#1723)
  • Re-added the brd drbd nbd rbd xen-blkfront zram libarc4 lru_cache zsmalloc kernel modules to the initramfs since they were missing compared to the Flatcar 3033.2.x releases where the 5.10 kernel is used (bootengine#40)

Changes

  • (none)

Updates

Packages:

  • docker 20.10.12
  • ignition 0.36.1
  • kernel 5.15.30
  • systemd 249

Architectures:

  • amd64
  • arm64
]]> 2022-03-23T13:34:49+00:00 https://github.com/kinvolk/manifest/releases/tag/v3139.1.0 3139.1.0 2026-03-09T16:26:27.289514+00:00 New Beta Release 3139.1.0

Changes since Alpha 3139.0.0

Security fixes

Bug fixes

  • Disabled the systemd-networkd settings ManageForeignRoutes and ManageForeignRoutingPolicyRules by default to ensure that CNIs like Cilium don't get their routes or routing policy rules discarded on network reconfiguration events (Flatcar#620).
  • Prevented hitting races when creating filesystems in Ignition, these races caused boot failures like fsck[1343]: Failed to stat /dev/disk/by-label/ROOT: No such file or directory when creating a btrfs root filesystem (ignition#35)
  • Reverted the Linux kernel change to forbid xfrm id 0 for IPSec state because it broke Cilium (Flatcar#626, coreos-overlay#1682)

Changes

  • Added support for switching back to CGroupsV1 without requiring a reboot. Create /etc/flatcar-cgroupv1 through ignition. (coreos-overlay#1666)

Updates

Changes since Beta 3066.1.2

Security fixes

Bug fixes

  • Excluded the Kubenet cbr0 interface from networkd's DHCP config and set it to Unmanaged to prevent interference and ensure that it is not part of the network online check (init#55)
  • Fixed the dracut emergency Ignition log printing that had a scripting error causing the cat command to fail (bootengine#33)
  • network: Accept ICMPv6 Router Advertisements to fix IPv6 address assignment in the default DHCP setting (init#51, coreos-cloudinit#12, bootengine#30)
  • flatcar-update: Stopped checking for the USER environment variable which may not be set in all environments, causing the script to fail unless a workaround was used like prepending an additional sudo invocation (init#58)
  • Disabled the systemd-networkd settings ManageForeignRoutes and ManageForeignRoutingPolicyRules by default to ensure that CNIs like Cilium don't get their routes or routing policy rules discarded on network reconfiguration events (Flatcar#620).
  • Prevented hitting races when creating filesystems in Ignition, these races caused boot failures like fsck[1343]: Failed to stat /dev/disk/by-label/ROOT: No such file or directory when creating a btrfs root filesystem (ignition#35)
  • Reverted the Linux kernel change to forbid xfrm id 0 for IPSec state because it broke Cilium (Flatcar#626, coreos-overlay#1682)

Changes

  • Update-engine now creates the /run/reboot-required flag file for kured (update_engine#15)
  • Excluded special network interface devices like bridge, tunnel, vxlan, and veth devices from the default DHCP configuration to prevent networkd interference (init#56)
  • Added CONFIG_NF_CT_NETLINK_HELPER (for libnetfilter_cthelper), CONFIG_NET_VRF (for virtual routing and forwarding) and CONFIG_KEY_DH_OPERATIONS (for keyutils) to the kernel config (coreos-overlay#1524)
  • Enabled the FIPS support for the Linux kernel, which users can now choose through a kernel parameter in grub.cfg (check it taking effect with cat /proc/sys/crypto/fips_enabled) (coreos-overlay#1602)
  • Added support for switching back to CGroupsV1 without requiring a reboot. Create /etc/flatcar-cgroupv1 through ignition. (coreos-overlay#1666)
  • Removed the pre-shipped /etc/flatcar/update.conf file, leaving it totally to the user to define the contents as it was unnecessarily overwriting the /use/share/flatcar/update.conf (flatcar-linux/scripts#212)

Updates

Packages:

  • docker 20.10.12
  • ignition 0.36.1
  • kernel 5.15.25
  • systemd 249

Architectures:

  • amd64
  • arm64
]]> 2022-03-07T13:13:36+00:00 https://github.com/kinvolk/manifest/releases/tag/v3066.1.2 3066.1.2 2026-03-09T16:26:27.278517+00:00 New Beta Release 3066.1.2

Changes since Beta 3066.1.1

Security fixes

Bug fixes

  • SDK: Fixed build error popping up in the new SDK Container because policycoreutils used the wrong ROOT to update the SELinux store (flatcar-linux/coreos-overlay#1502)
  • Fixed leak of SELinux policy store to the root filesystem top directory due to wrong store path in policycoreutils instead of /var/lib/selinux (flatcar-linux/Flatcar#596)

Updates

Packages:

  • docker 20.10.12
  • ignition 0.36.1
  • kernel 5.10.96
  • systemd 249

Architectures:

  • amd64
  • arm64
]]> 2022-02-09T10:02:57+00:00 https://github.com/kinvolk/manifest/releases/tag/v3066.1.1 3066.1.1 2026-03-09T16:26:27.271483+00:00 New Beta release 3066.1.1

Changes since Beta 3066.1.0

Known issues:

  • The SELinux policy store update fix resulted in some files leaked to the root filesystem top directory (flatcar-linux/Flatcar#596)

Security fixes:

Bug fixes:

  • Ensured that the /run/xtables.lock coordination file exists for modifications of the xtables backend from containers (must be bind-mounted) or the iptables-legacy binaries on the host (flatcar-linux/init#57)
  • Excluded the Kubenet cbr0 interface from networkd’s DHCP config and set it to Unmanaged to prevent interference and ensure that it is not part of the network online check (flatcar-linux/init#55)
  • dev container: Fix github URL for coreos-overlay and portage-stable to use repos from flatcar-linux org directly instead of relying on redirects from the kinvolk org. This fixes checkouts with emerge-gitclone inside dev-container. (flatcar-linux/scripts#194)
  • SDK: Fixed build error popping up in the new SDK Container because policycoreutils used the wrong ROOT to update the SELinux store (flatcar-linux/coreos-overlay#1502)

Changes:

Updates:

Packages:

  • docker 20.10.12
  • ignition 0.36.1
  • kernel 5.10.93
  • systemd 249

Architectures:

  • amd64
  • arm64
]]> 2022-01-26T08:13:36+00:00 https://github.com/kinvolk/manifest/releases/tag/v3066.1.0 3066.1.0 2026-03-09T16:26:27.261023+00:00 New Beta release 3066.1.0

Changes since Alpha 3066.0.0

Security fixes

Bug Fixes

Changes

  • Added a new flatcar-update tool to the image to ease manual updates, rollbacks, channel/release jumping, and airgapped updates (flatcar-linux/init#53)

Updates

Changes since Beta 3033.1.1

Security fixes

Changes:

Bug Fixes

Updates

Packages:

  • docker 20.10.11
  • ignition 0.36.1
  • kernel 5.10.84
  • systemd 249

Architectures:

  • amd64
  • arm64
]]> 2021-12-15T19:40:26+00:00 https://github.com/kinvolk/manifest/releases/tag/v3033.1.1 3033.1.1 2026-03-09T16:26:27.254411+00:00 New Beta Release 3033.1.1

Changes since Beta 3033.1.0

Security fixes

Updates

Changes

  • Added missing SELinux rule as initial step to resolve Torcx unpacking issue (coreos-overlay#1426)

Packages:

  • docker 20.10.11
  • ignition 0.34.0
  • kernel 5.10.80
  • systemd 249

Architectures:

  • amd64
  • arm64
]]> 2021-11-25T11:11:55+00:00 https://github.com/kinvolk/manifest/releases/tag/v3033.1.0 3033.1.0 2026-03-09T16:26:27.240735+00:00 New Beta release 3033.1.0

Changes since Alpha 3033.0.0

Security fixes

Changes

Updates

Changes since Beta 2983.1.2

Security fixes

Bug fixes

Changes

Updates

Packages:

  • docker 20.10.10
  • ignition 0.34.0
  • kernel 5.10.77
  • systemd 249

Architectures:

  • amd64
  • arm64
]]> 2021-11-09T06:39:46+00:00 https://github.com/kinvolk/manifest/releases/tag/v2983.1.2 2983.1.2 2026-03-09T16:26:27.231975+00:00 Update to CGroupsV2

As of Alpha version 2969.0.0, Flatcar Container Linux migrates to the unified cgroup hierarchy (aka CGroupsV2)! New nodes will utilize CGroupsV2 by default. Existing nodes remain on CGroupsV1 and need to be manually migrated to CGroupsV2. To learn more about CGroupsV2 on Flatcar Container Linux and the migration guide, please refer to https://flatcar-linux.org/docs/latest/container-runtimes/switching-to-unified-cgroups/

New Beta release 2983.1.2

Changes since Beta 2983.1.1

Security fixes

Bux fixes

Updates

Packages:

  • docker 20.10.9
  • ignition 0.34.0
  • kernel 5.10.75
  • systemd 247

Architectures:

  • amd64
]]> 2021-10-25T15:56:14+00:00 https://github.com/kinvolk/manifest/releases/tag/v2983.1.1 2983.1.1 2026-03-09T16:26:27.227375+00:00 New Beta release 2983.1.1

Changes since Beta 2983.1.0

Security fixes

Updates

Packages:

  • docker 20.10.8
  • ignition 0.34.0
  • kernel 5.10.69
  • systemd 247

Architectures:

  • amd64
]]> 2021-09-30T16:22:00+00:00 https://github.com/kinvolk/manifest/releases/tag/v2983.1.0 2983.1.0 2026-03-09T16:26:27.217124+00:00 New Beta release 2983.1.0

Changes since Beta 2942.1.2

Update to CGroupsV2

As of Alpha version 2969.0.0, Flatcar Container Linux migrates to the unified cgroup hierarchy (aka CGroupsV2)! New nodes will utilize CGroupsV2 by default. Existing nodes remain on CGroupsV1 and need to be manually migrated to CGroupsV2. To learn more about CGroupsV2 on Flatcar Container Linux and the migration guide, please refer to https://flatcar-linux.org/docs/latest/container-runtimes/switching-to-unified-cgroups/

Security fixes

Bug Fixes

Changes

  • Added Azure Generation 2 VM support (coreos-overlay#1198)
  • cgroups v2 by default for new nodes (coreos-overlay#931).
  • Upgrade Docker to 20.10 (coreos-overlay#931)
  • Switched Docker ecosystem packages to go1.16 (coreos-overlay#1217)
  • Added lbzip2 binary to the image (coreos-overlay#1221)
  • flatcar-install uses lbzip2 if present, falls back on bzip2 if not (init#46)
  • Added Intel E800 series network adapter driver (coreos-overlay#1237)
  • Enabled 'audit' use flag for sys-libs/pam (coreos-overlay#1233)
  • Bumped etcd and flannel to respectively 3.5.0, 0.14.0 to get multiarch images for arm64 support. Note for users of the old etcd v2 support: ETCDCTL_API=2 must be set to use v2 store as well as ETCD_ENABLE_V2=true in the etcd-member.service - this support will be removed in 3.6.0 (coreos-overlay#1179)
  • Switched to zstd compression for the initramfs (coreos-overlay#1136)
  • Support BTRFS in OEM and /usr partitions, but only used it for the OEM partition for now. Ignition configurations that refer to the OEM partition will work with any filesystem format specified, a mismatch is not resulting in a boot error. (coreos-overlay#1106)
  • Switched the arm64 kernel to use a 4k page size instead of 64k
  • Switched dm-verity corruption detection to issue a kernel panic (a panic results in a reboot after 1 minute, this was the case before already) instead of merely failing certain syscalls that try to use the corrupted data
  • Support BTRFS in OEM and /usr partitions, but only used it for the OEM partition for now. Ignition configurations that refer to the OEM partition will work with any filesystem format specified, a mismatch is not resulting in a boot error. (coreos-overlay#1106)
  • Enabled zstd compression for the initramfs and for amd64 also for the kernel because we hit the vmlinuz size limit on the /boot partition
  • Deleted the unused kernel+initramfs vmlinuz file from the /usr partition
  • devcontainer: added support to run on arm64 by switching to an architecture-agnostic partition UUID
  • Enabled ARM64 SDK bootstrap (scripts#134)
  • SDK: enabled experimental ARM64 SDK usage (flatcar-scripts#134) (flatcar-scripts#141)
  • AWS: Added amazon-ssm-agent (coreos-overlay#1162)
  • Azure: Compile OEM contents for all architectures (coreos-overlay#1196)
  • update_engine: add postinstall hook to stay on cgroupv1 (update_engine#13)

Updates

Changes since Alpha 2983.0.0

Security fixes

Updates

Packages:

  • docker 20.10.8
  • ignition 0.34.0
  • kernel 5.10.63
  • systemd 247

Architectures:

  • amd64
]]> 2021-09-16T14:56:46+00:00 https://github.com/kinvolk/manifest/releases/tag/v2942.1.2 2942.1.2 2026-03-09T16:26:27.209079+00:00 New Beta release 2942.1.2

Changes since Beta 2942.1.1

Security fixes

Bug Fixes

Updates

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.61
  • systemd 247

Architectures:

  • amd64
]]> 2021-09-01T14:14:50+00:00 https://github.com/kinvolk/manifest/releases/tag/v2942.1.1 2942.1.1 2026-03-09T16:26:27.203414+00:00 Changes since Beta 2942.1.0

Security fixes

Bug Fixes

Changes

Updates

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.59
  • systemd 247

Architectures:

  • amd64
]]> 2021-08-19T13:36:00+00:00 https://github.com/kinvolk/manifest/releases/tag/v2942.1.0 2942.1.0 2026-03-09T16:26:27.195108+00:00 Changes since Beta 2920.1.0

Security Fixes

Bug Fixes

  • Added the systemd tag in udev for Azure storage devices, to fix /boot automount (init#41)
  • Disabled SELinux by default on dockerd wrapper script (coreos-overlay#1149)
  • Set the cilium_vxlan interface to be not managed by networkd's default setup with DHCP as it's managed by Cilium. (init#43)
  • update_engine_client: Improve feedback when an update is not needed(update_engine#10)
  • GCE: Granted CAP_NET_ADMIN to set routes for the TCP LB when starting oem-gce.service (coreos-overlay#1146)

Changes

Updates

Changes since Alpha 2942.0.0

Security fixes

Bug fixes

  • Set the cilium_vxlan interface to be not managed by networkd's default setup with DHCP as it's managed by Cilium. (init#43)
  • Disabled SELinux by default on dockerd wrapper script (coreos-overlay#1149)
  • GCE: Granted CAP_NET_ADMIN to set routes for the TCP LB when starting oem-gce.service (coreos-overlay#1146)

Updates

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.55
  • systemd 247

Architectures:

  • amd64
]]> 2021-08-04T13:23:23+00:00 https://github.com/kinvolk/manifest/releases/tag/v2920.1.0 2920.1.0 2026-03-09T16:26:27.188445+00:00 Changes since Alpha 2920.0.0

Security Fixes

Updates

Changes since Beta 2905.1.0

Updates

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.52
  • systemd 247

Architectures:

  • amd64
]]> 2021-07-28T08:21:00+00:00 https://github.com/kinvolk/manifest/releases/tag/v2905.1.0 2905.1.0 2026-03-09T16:26:27.180435+00:00 Changes since Alpha 2905.0.0: Security fixes

Changes

Updates

Changes since Beta 2823.1.3: Security fixes

Bug Fixes

Updates

Deprecation

  • rkt and kubelet-wrapper are deprecated and removed from Beta, also from subsequent channels in the future. Please read the removal announcement to know more.

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.46
  • systemd 247

Architectures:

  • amd64
]]> 2021-07-02T07:37:53+00:00 https://github.com/kinvolk/manifest/releases/tag/v2823.1.3 2823.1.3 2026-03-09T16:26:27.174336+00:00 Security fixes

Bug fixes

  • Update-engine sent empty requests when restarted before a pending reboot (Flatcar#388)

Changes

Updates

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.43
  • systemd 247

Architectures:

  • amd64
]]> 2021-06-17T10:30:54+00:00 https://github.com/kinvolk/manifest/releases/tag/v2823.1.2 2823.1.2 2026-03-09T16:26:27.170361+00:00 Bug fixes

  • The Linux kernel IOMMU-related crash introduced in the 5.10.37 update got fixed through the 5.10.38 update (Flatcar#400)

Updates

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.38
  • systemd 247

Architectures:

  • amd64
]]> 2021-05-21T12:08:31+00:00 https://github.com/kinvolk/manifest/releases/tag/v2823.1.1 2823.1.1 2026-03-09T16:26:27.166047+00:00 Security fixes

Updates

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.37
  • systemd 247

Architectures:

  • amd64
]]> 2021-05-19T11:39:05+00:00 https://github.com/kinvolk/manifest/releases/tag/v2823.1.0 2823.1.0 2026-03-09T16:26:27.157567+00:00 Changes since Alpha 2823.0.0:

Security fixes

Bug fixes

Updates

Changes since Beta 2801.1.0:

Security fixes

Bug Fixes

Changes

  • The pam_faillock PAM module was enabled as replacement for the removed pam_tally2 module and will temporarily lock an account if there were login attempts with a wrong password. The faillock command can be used to show the current state. With pam_tally2 there was no limit for wrong password login attempts but with faillock the default is already restricting the attempts. The default behavior was relaxed to allow 5 wrong passwords per two minutes, and a one minute account lock time. This does not apply to logins with an SSH key. (baselayout#17)
  • The etcd and flannel services are now run with Docker and any rkt-based customizations of the etcd-member and flanneld services not supported anymore. Also, because the flanneld service relies on Docker and will restart Docker after applying the new configuration, it is not possible anymore to set Requires=flanneld.service for docker.service and instead it’s enough to have flanneld.service enabled. (coreos-overlay#857)

Updates

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.32
  • systemd 247

Architectures:

  • amd64
]]> 2021-04-28T13:33:49+00:00 https://github.com/kinvolk/manifest/releases/tag/v2801.1.0 2801.1.0 2026-03-09T16:26:27.149928+00:00 Security fixes

Bug Fixes

  • GCE: The old interface name ens4v1 which was replaced by eth0 due to a broken udev rule was restored, but now as alternative interface name, and eth0 will stay the primary name for consistency across cloud environments. (init#38)

Changes

  • The virtio network interfaces got predictable interface names as alternative interface names, and thus these names can also be used to match for a specific interface in case there is more than one and the eth0 and eth1 name assignment is not stable. (init#38)

Updates

Deprecation

  • dhcpcd and containerd-stress are deprecated and removed from Beta, also from subsequent channels in the future. Users that relied on dhcpd should either migrate to systemd-networkd as a DHCP server or run dhcpd from a container.
  • Docker 1.12 is deprecated and removed from Beta, also from subsequent channels in the future.

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.25
  • systemd 247

Architectures:

  • amd64
]]> 2021-03-25T15:38:18+00:00 https://github.com/kinvolk/manifest/releases/tag/v2765.1.0 2765.1.0 2026-03-09T16:26:27.144065+00:00 Security fixes

Bug Fixes

Updates

Packages:

  • docker 19.03.15
  • ignition 0.34.0
  • kernel 5.10.16
  • systemd 247

Architectures:

  • amd64
]]> 2021-02-18T12:44:47+00:00 https://github.com/kinvolk/manifest/releases/tag/v2705.1.2 2705.1.2 2026-03-09T16:26:27.138637+00:00 Security fixes

Bug fixes

  • /etc/iscsi/initiatorname.iscsi is generated by the iscsi-init service (#321)
  • Prevent iscsiadm buffer overflow (#318)

Changes

  • Revert to building docker and containerd with go1.13 instead of go1.15. This reduces the SIGURG log spam (Issue #315 PR #774)
  • The containerd socket is now available in the default location (/run/containerd/containerd.sock) and also as a symlink in the previous location (/run/docker/libcontainerd/docker-containerd.sock) (#771)
  • With the iscsi update, the service unit has changed from iscsid to iscsi (#791)
  • AWS Pro: include scripts to facilitate setup of EKS workers (#794).
  • Missed from earlier notes: with the previous open-iscsi update to 2.1.2, the service unit name changed from iscsid to iscsi (#682)

Updates

Packages:

  • docker 19.03.14
  • ignition 0.34.0
  • kernel 5.9.16
  • systemd 246

Architectures:

  • amd64
]]> 2021-01-28T11:01:35+00:00 https://github.com/kinvolk/manifest/releases/tag/v2705.1.1 2705.1.1 2026-03-09T16:26:27.132887+00:00 Security fixes

Bug fixes

  • The sysctl net.ipv4.conf.*.rp_filter is set to 0 for the Cilium CNI plugin to work (kinvolk/Flatcar#181)
  • Package downloads in the developer container now use the correct URL again (kinvolk/Flatcar#298)
  • networkd: avoid managing MAC addresses for veth devices (kinvolk/init#33)

Changes

  • The sysctl default config file is now applied under the prefix 60 which allows for custom sysctl config files to take effect when they start with a prefix of 70, 80, or 90 (kinvolk/baselayout#13)
  • Containerd CRI plugin got enabled by default, only the containerd socket path needs to be specified as kubelet parameter for Kubernetes 1.20 to use containerd instead of Docker (kinvolk/Flatcar#283)
  • For users with a custom update server a machine alias setting in update-engine allows to give human-friendly names to client instances (kinvolk/update-engine#8)

Updates

Packages:

  • docker 19.03.14
  • ignition 0.34.0
  • kernel 5.9.16
  • systemd 246

Architectures:

  • amd64
]]> 2021-01-12T17:00:58+00:00 https://github.com/kinvolk/manifest/releases/tag/v2705.1.0 2705.1.0 2026-03-09T16:26:27.128530+00:00 Security fixes:

  • No changes since Alpha 2705.0.0

Bug fixes:

  • No changes since Alpha 2705.0.0

Changes:

  • No changes since Alpha 2705.0.0

Updates:

  • No changes since Alpha 2705.0.0

Packages:

  • docker 19.03.13
  • ignition 0.34.0
  • kernel 5.9.11
  • systemd 246

Architectures:

  • amd64
]]> 2020-12-01T13:28:41+00:00 https://github.com/kinvolk/manifest/releases/tag/v2643.1.1 2643.1.1 2026-03-09T16:26:27.124540+00:00 Security fixes:

Bug fixes:

Updates:

Packages:

  • docker 19.03.13
  • ignition 0.34.0
  • kernel 5.8.18
  • systemd 245

Architectures:

  • amd64
]]> 2020-11-19T15:42:05+00:00 https://github.com/flatcar/manifest/releases/tag/v2643.1.0 2643.1.0 2026-03-09T16:26:27.120546+00:00 Security fixes:

Bug fixes:

  • Ensured that the /etc/coreos to /etc/flatcar symlink always exists, relevant for the Container Linux Config transpiler (ct) when specifying directives for update: or locksmith: while also reformatting the rootfs (baselayout PR#7)

Updates:

Packages:

  • docker 19.03.13
  • ignition 0.34.0
  • kernel 5.8.14
  • systemd 245

Architectures:

  • amd64
]]> 2020-10-16T08:05:22+00:00 https://github.com/flatcar/manifest/releases/tag/v2632.1.0 2632.1.0 2026-03-09T16:26:27.115842+00:00 Security fixes:

Bug fixes:

  • Enabled missing systemd services (#191, PR #612)
  • Fixed Docker torcx image unpacking error on machines with less than ~600 MB total RAM (#32)
  • Solved adcli Kerberos Active Directory incompatibility (#194)
  • Fixed the makefile path when building kernel modules with the developer container (#195)
  • Removed the /etc/portage/savedconfig/ folder that contained a dump of the firmware config flatcar-linux/coreos-overlay#613

Changes:

  • GCE: Improved oslogin support and added shell aliases to run a Python Docker image (PR #592)

Updates:

Packages:

  • docker 19.03.12
  • ignition 0.34.0
  • kernel 5.8.11
  • rkt 1.30.0
  • systemd 245

Architectures:

  • amd64
]]> 2020-09-30T12:22:40+00:00 https://github.com/flatcar/manifest/releases/tag/v2605.4.0 2605.4.0 2026-03-09T16:26:27.111290+00:00 Bug fixes:

  • Fix resetting of DNS nameservers in systemd-networkd units (PR#12)

Changes:

  • Disable TX checksum offloading for the IP-in-IP tunl0 interface used by Calico (PR#26). This is a workaround for a Mellanox driver issue, currently tracked in Flatcar#183
  • Set sysctl net.ipv4.conf.(all|*).rp_filter to 0 (instead of the systemd upstream value 2) to be less restrictive which some network solutions rely on (PR#11)
  • flatcar-install allows installation to a multipath drive (PR#24)

Updates:

Packages:

  • docker 19.03.12
  • ignition 0.34.0
  • kernel 5.4.65
  • rkt 1.30.0
  • systemd 245

Architectures:

  • amd64
]]> 2020-09-16T06:13:42+00:00 https://github.com/flatcar/manifest/releases/tag/v2605.3.0 2605.3.0 2026-03-09T16:26:27.107333+00:00 Security fixes:

Updates:

Packages:

  • docker 19.03.12
  • ignition 0.34.0
  • kernel 5.4.62
  • rkt 1.30.0
  • systemd 245

Architectures:

  • amd64
]]> 2020-09-07T15:37:41+00:00 https://github.com/flatcar/manifest/releases/tag/v2605.2.0 2605.2.0 2026-03-09T16:26:27.103881+00:00 Changes from Alpha release 2605.1.0

Changes:

Packages:

  • docker 19.03.12
  • ignition 0.34.0
  • kernel 5.4.61
  • rkt 1.30.0
  • systemd 245

Architectures:

  • amd64
]]> 2020-09-03T12:48:56+00:00 https://github.com/flatcar/manifest/releases/tag/v2513.3.0 2513.3.0 2026-03-09T16:26:27.099512+00:00 Security fixes:

Bug fixes:

Updates:

Packages:

  • docker 19.03.11
  • ignition 0.34.0
  • kernel 5.4.59
  • rkt 1.30.0
  • systemd 243

Architectures:

  • amd64
]]> 2020-08-20T21:46:48+00:00 https://github.com/flatcar/manifest/releases/tag/v2513.2.0 2513.2.0 2026-03-09T16:26:27.095617+00:00 Changes since the Alpha release 2513.1.0

Bug Fixes:

Updates:

Packages:

  • docker 19.03.11
  • ignition 0.34.0
  • kernel 5.4.52
  • rkt 1.30.0
  • systemd 243

Architectures:

  • amd64
]]> 2020-07-23T09:44:10+00:00 https://github.com/flatcar/manifest/releases/tag/v2512.1.1 2512.1.1 2026-03-09T16:26:27.091735+00:00 Flatcar updates

Security fixes:

Changes:

  • A source code and licensing overview is available under /usr/share/licenses/INFO

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.34.0
  • kernel 4.19.128
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2020-06-17T15:46:09+00:00 https://github.com/flatcar/manifest/releases/tag/v2512.1.0 2512.1.0 2026-03-09T16:26:27.084856+00:00 Flatcar updates

Security fixes:

Bug fixes:

  • When writing the update kernel, prefer /boot/coreos only if /boot/coreos/vmlinux-* exists (https://github.com/flatcar/update_engine/pull/5)
  • Fixed sysroot-boot initramfs service race which resulted in a warning that this service failed
  • Use the correct BINHOST URLs in the development container to download binary packages

Changes:

  • Support the CoreOS GRUB /boot/coreos/first_boot flag file (https://github.com/flatcar/bootengine/pull/13)
  • Fetch container images in docker format rather than ACI by default in etcd-member.service, flanneld.service, and kubelet-wrapper
  • Use flatcar.autologin kernel command line parameter on Azure and VMware for auto login on the serial console
  • Include conntrack (conntrack-tools)
  • Include journalctl output, pstore kernel crash logs, and coredumpctl list output in the mayday report
  • Update wa-linux-agent to 2.2.46 on Azure
  • Support both coreos.config.* and flatcar.config.* guestinfo variables on VMware OEM

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.34.0
  • kernel 4.19.124
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2020-05-26T16:58:31+00:00 https://github.com/flatcar/manifest/releases/tag/v2411.1.1 2411.1.1 2026-03-09T16:26:27.079135+00:00 Flatcar updates

Bug fixes:

  • Use newest network interface naming scheme (https://github.com/flatcar/Flatcar/issues/36)
    • It is a possible breaking change for some persistent network interface names
  • Fix URL scheme in emerge-gitclone (https://github.com/flatcar/coreos-overlay/issues/223)
  • Fix coreos-cloudinit variable names (https://github.com/flatcar/coreos-overlay/pull/206)
  • Prefer /boot/coreos to write updates (https://github.com/flatcar/update_engine/pull/2)
  • Remove /boot/coreos/first_boot after a Ignition rerun on migration (https://github.com/flatcar/bootengine/pull/10)
  • Support coreos.config.url as kernel command line parameter for Ignition (https://github.com/flatcar/ignition/pull/10)

Changes:

  • Add kernel config for QEDE driver (https://github.com/flatcar/coreos-overlay/pull/198)
  • Add tracepath alongside traceroute6 (https://github.com/flatcar/Flatcar/issues/50)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.34.0
  • kernel 4.19.112
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2020-03-31T16:25:22+00:00 https://github.com/flatcar/manifest/releases/tag/v2411.1.0 2411.1.0 2026-03-09T16:26:27.074967+00:00 Flatcar updates

Bug fixes:

  • Enable persistent network interface names already in the initramfs to fix https://github.com/coreos/bugs/issues/1767
  • Fix backwards compatibility issues for users to migrate from CoreOS Container Linux. Support the kernel command line parameters coreos.oem.*, coreos.autologin, coreos.first_boot, and the QEMU firmware config path opt/com.coreos/config (https://github.com/flatcar/Flatcar/issues/16 https://github.com/flatcar/afterburn/pull/7 https://github.com/flatcar/bootengine/pull/7 https://github.com/flatcar/bootengine/pull/8 https://github.com/flatcar/init/pull/16 https://github.com/flatcar/init/pull/17 https://github.com/flatcar/ignition/pull/8)

Upstream Container Linux updates

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.34.0
  • kernel 4.19.106
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2020-03-02T11:57:48+00:00 https://github.com/flatcar/manifest/releases/tag/v2345.2.0 2345.2.0 2026-03-09T16:26:27.070711+00:00 Flatcar updates

Bug fixes:

  • Fix DNS resolution for the GCE metadata server (https://github.com/flatcar/coreos-overlay/pull/160)
  • Create symlink for /run/metadata/coreos (https://github.com/flatcar/coreos-overlay/pull/166)
  • Create symlink for flatcar-install (https://github.com/flatcar/init/pull/14)

Upstream Container Linux updates:

Security fixes:

  • Fix systemd use-after-free upon receiving crafted D-Bus message from local unprivileged attacker (CVE-2020-1712)

Changes:

  • Enable qede kernel module

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.102
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2020-02-10T11:11:29+00:00 https://github.com/flatcar/manifest/releases/tag/v2345.1.0 2345.1.0 2026-03-09T16:26:27.066036+00:00 Upstream Container Linux updates:

Security fixes:

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.95
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2020-01-17T13:33:11+00:00 https://github.com/flatcar/manifest/releases/tag/v2331.1.1 2331.1.1 2026-03-09T16:26:27.061713+00:00 Flatcar updates

Bug fixes:

  • Fix a bug when creating RAID0 arrays by setting the default layout (https://github.com/flatcar/baselayout/pull/2)
  • Fix bug of unpacking tarballs failing when xattr is not supported (https://github.com/flatcar/torcx/pull/2)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.87
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-12-18T09:49:53+00:00 https://github.com/flatcar/manifest/releases/tag/v2331.1.0 2331.1.0 2026-03-09T16:26:27.057953+00:00 Upstream Container Linux updates:

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.87
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-12-05T06:34:11+00:00 https://github.com/flatcar/manifest/releases/tag/v2303.2.0 2303.2.0 2026-03-09T16:26:27.053759+00:00 Upstream Container Linux updates:

Security fixes:

Bug fixes:

  • Fix CFS scheduler throttling highly-threaded I/O-bound applications (#2623)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.84
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-11-21T09:28:13+00:00 https://github.com/flatcar/manifest/releases/tag/v2303.1.1 2303.1.1 2026-03-09T16:26:27.049686+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix time zone for Brazil (#2627)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.81
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-11-11T14:13:02+00:00 https://github.com/flatcar/manifest/releases/tag/v2275.2.0 2275.2.0 2026-03-09T16:26:27.046116+00:00 Upstream Container Linux updates:

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.79
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-10-17T18:54:07+00:00 https://github.com/flatcar/manifest/releases/tag/v2247.4.0 2247.4.0 2026-03-09T16:26:27.042520+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix kernel crash with CephFS mounts, introduced in 2247.3.0 (#2616)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.78
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-10-16T15:09:03+00:00 https://github.com/flatcar/manifest/releases/tag/v2247.3.0 2247.3.0 2026-03-09T16:26:27.038640+00:00 Upstream Container Linux updates:

Security fixes:

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.75
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-09-25T09:32:22+00:00 https://github.com/flatcar/manifest/releases/tag/v2247.2.0 2247.2.0 2026-03-09T16:26:27.034965+00:00 Upstream Container Linux updates:

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.71
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-09-13T10:53:37+00:00 https://github.com/flatcar/manifest/releases/tag/v2219.3.0 2219.3.0 2026-03-09T16:26:27.030988+00:00 Upstream Container Linux updates:

Security fixes:

  • Fix pam_systemd bug allowing authenticated remote users to perform polkit actions as if locally logged in (CVE-2019-3842)
  • Fix systemd-resolved bug allowing unprivileged users to change DNS settings (CVE-2019-15718)

Bug fixes:

  • Fix GCE agent crash loop in new installs (#2608)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.69
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-09-05T08:53:14+00:00 https://github.com/flatcar/manifest/releases/tag/v2219.2.1 2219.2.1 2026-03-09T16:26:27.026960+00:00 Upstream Container Linux updates:

Security fixes:

  • Fix wget buffer overflow allowing arbitrary code execution (CVE-2019-5953)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.68
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-08-30T07:37:15+00:00 https://github.com/flatcar/manifest/releases/tag/v2219.2.0 2219.2.0 2026-03-09T16:26:27.022910+00:00 Upstream Container Linux updates:

Security fixes:

  • Use secure_getenv to fix a vulnerability around XDG_SEAT in pam_systemd (https://github.com/coreos/systemd/pull/118) (CVE-2019-3842)

Updates:

Flatcar updates

Bug fixes:

  • Fix wrong key name for fw_cfg in ignition with QEMU (https://github.com/flatcar/ignition/issues/2)
  • Get SELinux context included in torcx tarballs (https://github.com/flatcar/scripts/pull/16)
  • Enable XattrPrivileged for untar to fix SELinux issue (https://github.com/flatcar/torcx/pull/1)

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.65
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-08-16T09:44:16+00:00 https://github.com/flatcar/manifest/releases/tag/v2191.3.0 2191.3.0 2026-03-09T16:26:27.018851+00:00 Upstream Container Linux updates:

Security fixes:

  • Fix Linux information leak attack vector via speculative side channel (CVE-2019-1125)

Updates:

Flatcar updates

Changes:

  • Add "-s" flag in flatcar-install to install to smallest disk (https://github.com/flatcar/init/pull/7)

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.65
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-08-08T08:18:09+00:00 https://github.com/flatcar/manifest/releases/tag/v2191.2.0 2191.2.0 2026-03-09T16:26:27.015225+00:00 Upstream Container Linux updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.62
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-08-01T09:15:48+00:00 https://github.com/flatcar/manifest/releases/tag/v2191.1.0 2191.1.0 2026-03-09T16:26:27.011887+00:00 Upstream Container Linux updates:

No changes for beta promotion

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.56
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-07-17T13:51:51+00:00 https://github.com/flatcar/manifest/releases/tag/v2163.4.0 2163.4.0 2026-03-09T16:26:27.008330+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix Ignition panic when no guestinfo.(coreos|ignition).config parameters are specified on VMware (coreos/ignition#821)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.33.0
  • kernel 4.19.55
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-07-03T08:02:30+00:00 https://github.com/flatcar/manifest/releases/tag/v2163.3.0 2163.3.0 2026-03-09T16:26:27.004774+00:00 Upstream Container Linux updates:

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.32.0
  • kernel 4.19.55
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-07-01T10:45:57+00:00 https://github.com/flatcar/manifest/releases/tag/v2135.3.1 2135.3.1 2026-03-09T16:26:27.000864+00:00 Upstream Container Linux updates:

Security fixes:

Bug fixes:

  • Fix invalid bzip2 compression of Container Linux release images (#2589)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.32.0
  • kernel 4.19.50
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-06-19T08:16:10+00:00 https://github.com/flatcar/manifest/releases/tag/v2135.2.0 2135.2.0 2026-03-09T16:26:26.997096+00:00 Upstream Container Linux updates:

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.32.0
  • kernel 4.19.44
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-05-21T20:28:25+00:00 https://github.com/flatcar/manifest/releases/tag/v2107.3.0 2107.3.0 2026-03-09T16:26:26.992995+00:00 Upstream Container Linux updates:

Security fixes:

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.31.0
  • kernel 4.19.43
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-05-16T10:57:15+00:00 https://github.com/flatcar/manifest/releases/tag/v2107.2.0 2107.2.0 2026-03-09T16:26:26.988988+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix systemd MountFlags=shared option (#2579)

Changes:

  • Pin network interface naming to systemd v238 scheme (#2578)

Packages:

  • docker 18.06.3
  • ignition 0.31.0
  • kernel 4.19.36
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-05-08T07:07:32+00:00 https://github.com/flatcar/manifest/releases/tag/v2107.1.0 2107.1.0 2026-03-09T16:26:26.985143+00:00 Upstream Container Linux updates:

Bug fixes:

  • Disable new sticky directory protections for backward compatibility (#2577)

Changes:

  • Enable atlantic kernel module (#2576)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.31.0
  • kernel 4.19.36
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-04-24T10:01:19+00:00 https://github.com/flatcar/manifest/releases/tag/v2079.2.0 2079.2.0 2026-03-09T16:26:26.981262+00:00 Upstream Container Linux updates:

Bug fixes:

  • Disable new sticky directory protections for backwards compatibility (#2577)

Changes:

  • Enable atlantic kernel module (#2576)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.31.0
  • kernel 4.19.34
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-04-17T07:53:14+00:00 https://github.com/flatcar/manifest/releases/tag/v2079.1.0 2079.1.0 2026-03-09T16:26:26.977505+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix systemd presets incorrectly handling escaped unit names (#2569)

Updates:

Packages:

  • docker 18.06.3
  • ignition 0.31.0
  • kernel 4.19.31
  • rkt 1.30.0
  • systemd 241

Architectures:

  • amd64
]]> 2019-03-26T13:08:57+00:00 https://github.com/flatcar/manifest/releases/tag/v2051.2.0 2051.2.0 2026-03-09T16:26:26.973846+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix systemd-journald memory leak (#2564)

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.30.0
  • kernel 4.19.28
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2019-03-12T14:37:08+00:00 https://github.com/flatcar/manifest/releases/tag/v2051.1.0 2051.1.0 2026-03-09T16:26:26.969971+00:00 Upstream Container Linux updates:

Security fixes:

  • Fix Linux use-after-free in sockfs_setattr (CVE-2019-8912)
  • Fix systemd crash from a specially-crafted D-Bus message (CVE-2019-6454)

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.30.0
  • kernel 4.19.25
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2019-02-27T08:53:46+00:00 https://github.com/flatcar/manifest/releases/tag/v2023.3.0 2023.3.0 2026-03-09T16:26:26.966307+00:00 Upstream Container Linux updates:

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.30.0
  • kernel 4.19.23
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2019-02-21T08:41:36+00:00 https://github.com/flatcar/manifest/releases/tag/v2023.2.0 2023.2.0 2026-03-09T16:26:26.962306+00:00 Upstream Container Linux updates:

Security fixes:

Changes:

  • Revert /sys/bus/rbd/add to Linux 4.14 behavior (#2544)

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.30.0
  • kernel 4.19.20
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2019-02-14T10:31:00+00:00 https://github.com/flatcar/manifest/releases/tag/v2023.1.0 2023.1.0 2026-03-09T16:26:26.958277+00:00 Upstream Container Linux updates:

Security fixes:

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.30.0
  • kernel 4.19.18
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2019-01-30T13:45:28+00:00 https://github.com/flatcar/manifest/releases/tag/v1995.1.0 1995.1.0 2026-03-09T16:26:26.954687+00:00 Upstream Container Linux updates:

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.29.1
  • kernel 4.19.13
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2019-01-18T09:10:26+00:00 https://github.com/flatcar/manifest/releases/tag/v1967.2.0 1967.2.0 2026-03-09T16:26:26.950721+00:00 Upstream Container Linux updates:

Security fixes:

  • Fix Go CPU denial of service in X.509 verification (CVE-2018-16875)
  • Fix PolicyKit always authorizing UIDs greater than INT_MAX (CVE-2018-19788)

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.28.0
  • kernel 4.14.88
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-12-21T09:08:43+00:00 https://github.com/flatcar/manifest/releases/tag/v1967.1.0 1967.1.0 2026-03-09T16:26:26.947019+00:00 Upstream Container Linux updates:

Changes:

  • Switch to the LTS Linux version 4.14.84 for the beta channel

Packages:

  • docker 18.06.1
  • ignition 0.28.0
  • kernel 4.14.84
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-12-06T09:43:43+00:00 https://github.com/flatcar/manifest/releases/tag/v1939.2.1 1939.2.1 2026-03-09T16:26:26.943311+00:00 Upstream Container Linux updates:

Security fixes:

  • Disable containerd CRI plugin to stop it from listening on a TCP port (#2524)

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.28.0
  • kernel 4.14.81
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-11-21T10:57:13+00:00 https://github.com/flatcar/manifest/releases/tag/v1939.1.0 1939.1.0 2026-03-09T16:26:26.939224+00:00 Upstream Container Linux updates:

Security fixes:

  • Fix systemd re-executing with arbitrary supplied state (CVE-2018-15686)
  • Fix systemd race allowing changing file permissions (CVE-2018-15687)
  • Fix systemd-networkd buffer overflow in the dhcp6 client (CVE-2018-15688)

Changes:

  • Switch to the LTS Linux version 4.14.79 for the beta channel

Packages:

  • docker 18.06.1
  • ignition 0.28.0
  • kernel 4.14.79
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-11-08T16:14:38+00:00 https://github.com/flatcar/manifest/releases/tag/v1911.2.0 1911.2.0 2026-03-09T16:26:26.935080+00:00 Upstream Container Linux updates:

Security fixes:

  • Fix Git remote code execution during recursive clone (CVE-2018-17456)

Bug fixes:

  • Fix missing kernel headers (#2505)

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.28.0
  • kernel 4.14.78
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-10-26T10:14:36+00:00 https://github.com/flatcar/manifest/releases/tag/v1911.1.1 1911.1.1 2026-03-09T16:26:26.931043+00:00 Flatcar updates

Changes:

Bug fixes:

Upstream Container Linux updates:

Changes:

  • Switch to the LTS Linux version 4.14.74 for the beta channel

Packages:

  • docker 18.06.1
  • ignition 0.28.0
  • kernel 4.14.74
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-10-11T13:18:49+00:00 https://github.com/flatcar/manifest/releases/tag/v1883.1.0 1883.1.0 2026-03-09T16:26:26.927074+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix Docker mounting named volumes (#2497)

Changes:

  • Switch to the LTS Linux version 4.14.69 for the beta channel

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.28.0
  • kernel 4.14.69
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-09-14T09:59:48+00:00 https://github.com/flatcar/manifest/releases/tag/v1855.3.0 1855.3.0 2026-03-09T16:26:26.922990+00:00 Upstream Container Linux updates:

Changes:

  • Drop AWS PV images from regions which do not support PV

Updates:

Packages:

  • docker 18.06.1
  • ignition 0.26.0
  • kernel 4.14.67
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-09-05T08:43:19+00:00 https://github.com/flatcar/manifest/releases/tag/v1855.2.0 1855.2.0 2026-03-09T16:26:26.918730+00:00 Upstream Container Linux updates:

Security fixes:

Bug fixes:

  • Fix PXE systems attempting to mount an ESP (#2491)

Changes:

  • Switch to the LTS Linux version 4.14.63 for the beta channel

Packages:

  • docker 18.06.0
  • ignition 0.26.0
  • kernel 4.14.63
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-08-17T12:09:29+00:00 https://github.com/flatcar/manifest/releases/tag/v1828.3.0 1828.3.0 2026-03-09T16:26:26.914635+00:00 Upstream Container Linux updates:

Security fixes:

Bug fixes:

  • Fix failure to mount large ext4 filesystems (#2485)

Updates:

Packages:

  • docker 18.03.1
  • ignition 0.26.0
  • kernel 4.14.60
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-08-08T10:49:50+00:00 https://github.com/flatcar/manifest/releases/tag/v1828.2.0 1828.2.0 2026-03-09T16:26:26.910832+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix kernel CIFS client (#2480)

Updates:

Packages:

  • docker 18.03.1
  • ignition 0.26.0
  • kernel 4.14.59
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-07-31T09:16:00+00:00 https://github.com/flatcar/manifest/releases/tag/v1828.1.0 1828.1.0 2026-03-09T16:26:26.907149+00:00 Upstream Container Linux updates:

Changes:

  • Switch to the LTS Docker version 18.03.1-ce for the beta channel
  • Switch to the LTS Linux version 4.14.57 for the beta channel

Packages:

  • docker 18.03.1
  • ignition 0.26.0
  • kernel 4.14.57
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-07-26T09:40:11+00:00 https://github.com/flatcar/manifest/releases/tag/v1800.3.0 1800.3.0 2026-03-09T16:26:26.903517+00:00 Upstream Container Linux updates:

Updates:

Packages:

  • docker 18.03.1
  • ignition 0.25.1
  • kernel 4.14.55
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-07-13T15:43:19+00:00 https://github.com/flatcar/manifest/releases/tag/v1800.2.0 1800.2.0 2026-03-09T16:26:26.899883+00:00 Upstream Container Linux updates:

Changes:

  • Switch to the LTS Docker version 18.03.1-ce for the beta channel
  • Switch to the LTS Linux version 4.14.50 for the beta channel

Packages:

  • docker 18.03.1
  • ignition 0.25.1
  • kernel 4.14.50
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-06-22T10:17:31+00:00 https://github.com/flatcar/manifest/releases/tag/v1772.4.0 1772.4.0 2026-03-09T16:26:26.896098+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix TCP connection stalls (#2457)

Updates:

Packages:

  • docker 18.03.1
  • ignition 0.24.1
  • kernel 4.14.49
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-06-15T14:51:22+00:00 https://github.com/flatcar/manifest/releases/tag/v1772.3.0 1772.3.0 2026-03-09T16:26:26.892398+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix Hyper-V network driver regression (#2454)

Updates:

Packages:

  • docker 18.03.1
  • ignition 0.24.1
  • kernel 4.14.48
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-06-13T13:22:40+00:00 https://github.com/flatcar/manifest/releases/tag/v1772.2.0 1772.2.0 2026-03-09T16:26:26.888238+00:00 Upstream Container Linux updates:

Security fixes:

  • Fix Git arbitrary code execution when cloning untrusted repositories (CVE-2018-11235)

Bug fixes:

  • Fix inadvertent change of network interface names (#2437)
  • Fix failure to set network interface MTU (#2443)

Updates:

Packages:

  • docker 18.03.1
  • ignition 0.24.1
  • kernel 4.14.47
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-06-01T13:23:43+00:00 https://github.com/flatcar/manifest/releases/tag/v1772.1.1 1772.1.1 2026-03-09T16:26:26.884161+00:00 Upstream Container Linux updates:

Changes:

  • Switch to the LTS Docker version 18.03.1-ce for the beta channel
  • Switch to the LTS Linux version 4.14.42 for the beta channel

Updates:

Packages:

  • docker 18.03.1
  • ignition 0.24.1
  • kernel 4.14.42
  • rkt 1.30.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-05-26T15:29:49+00:00 https://github.com/flatcar/manifest/releases/tag/v1745.2.0 1745.2.0 2026-03-09T16:26:26.879444+00:00 Upstream Container Linux updates:

Security fixes:

Updates:

Packages:

  • docker 18.03.1
  • ignition 0.24.0
  • kernel 4.14.39
  • rkt 1.29.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-05-11T11:40:35+00:00 https://github.com/flatcar/manifest/releases/tag/v1745.1.0 1745.1.0 2026-03-09T16:26:26.875211+00:00 Upstream Container Linux updates:

Bug fixes:

  • Fix docker2aci tar conversion (#2402)

Changes:

  • Switch to the LTS Linux version 4.14.35 for the beta channel

Packages:

  • docker 18.03.0
  • ignition 0.24.0
  • kernel 4.14.35
  • rkt 1.29.0
  • systemd 238

Architectures:

  • amd64
]]> 2018-04-26T09:58:55+00:00 https://github.com/flatcar/manifest/releases/tag/v1722.2.0 1722.2.0 2026-03-09T16:26:26.870501+00:00 Flatcar updates

Initial Flatcar release.

Bug fixes:

Notes:

  • Previous test images have been removed from the release servers. This is due to a new update key being generated using our updated security policy which we included in the first public image.

Upstream Container Linux updates:

Bug fixes:

  • Fix kernel panic with vxlan (#2382)

Packages:

  • docker 17.12.1
  • ignition 0.23.0
  • kernel 4.14.30
  • rkt 1.29.0
  • systemd 237

Architectures:

  • amd64
]]> 2018-04-25T14:36:40+00:00