Flatcar Container Linux

stable-4757.2.1Provisioning & Runtime

Sep 29, 2026

A security-focused maintenance release with Linux and OpenSSL updates. It also fixes an installer defect and enables additional amd64 debugging support.

Action needed (2)

securitycriticalLinux security updates
Linux is updated with fixes associated with CVE-2026-100079, CVE-2026-100078, and CVE-2026-100075.
CVE-2026-100079 CVE-2026-100078 CVE-2026-100075
securityhighOpenSSL security updates
OpenSSL is updated with fixes associated with CVE-2026-35191, CVE-2026-54875, CVE-2026-72897, CVE-2026-75804, CVE-2026-75805, CVE-2026-75806, CVE-2026-54872, CVE-2026-77696, CVE-2026-84782, CVE-2026-84784, and CVE-2026-35189.
CVE-2026-35191 CVE-2026-54875 CVE-2026-72897

All 4 other recorded changesvalue changes 2 · defaults 1 · fixes 1

value changes (2)

- Linux ([6.12.111](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.12.111) (includes [6.12.110](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.12.110)))
- OpenSSL ([3.5.9](https://github.com/openssl/openssl/releases#release-openssl-3.5.9) (includes [3.5.8](https://github.com/openssl/openssl/releases#release-openssl-3.5.8)))

defaults (1)

- Enabled CONFIG_FPROBE for amd64 images to support additional ebpf based debug tools.

fixes (1)

- Fixed 'flatcar-install' quotes bug with new '/etc/os-release' file format

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