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May 2026Clear ×Project: Flatcar Container LinuxClear ×

Flatcar Container Linuxstable-4593.2.2Provisioning & RuntimeMay 27, 2026

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Flatcar stable-4593.2.2 is a maintenance release with Linux security fixes. It also updates Linux to 6.12.91 and ca-certificates to 3.124.

Action needed (1)

securitycriticalLinux security fixes
Linux security fixes for CVE-2024-36476, CVE-2024-39282, CVE-2024-53681, CVE-2024-54031, CVE-2024-57795, CVE-2024-57801, CVE-2024-57802, CVE-2024-57841, CVE-2024-57844, CVE-2024-57857, CVE-2024-57882, CVE-2024-57883, CVE-2024-57884, CVE-2024-57885, CVE-2024-57886, CVE-2024-57887, CVE-2024-57888, CVE-2024-57889, CVE-2024-57890, CVE-2024-57891, CVE-2024-57892, CVE-2024-57893, CVE-2024-57894, CVE-2024-57895, CVE-2024-57896, CVE-2024-57897, CVE-2024-57898, CVE-2024-57899, CVE-2024-57900, CVE-2024-57901, CVE-2024-57902, CVE-2024-57903, CVE-2024-57930, CVE-2024-57931, CVE-2024-57932, CVE-2024-57933, CVE-2024-57934, CVE-2024-57935, CVE-2024-57936, CVE-2024-57937, CVE-2024-57938, CVE-2024-58237, CVE-2025-21629, CVE-2025-21630, CVE-2026-43490, CVE-2026-43492, CVE-2026-43495, CVE-2026-43496, CVE-2026-43497, CVE-2026-43502, CVE-2026-43503, CVE-2026-46300, and CVE-2026-46333 ship in Flatcar stable-4593.2.2.

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Flatcar Container Linuxlts-4081.3.8Provisioning & RuntimeMay 27, 2026

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This Flatcar LTS release contains Linux security fixes identified by CVEs, plus ca-certificates and Linux component updates. It is most relevant to deployments tracking the lts-4081.3.8 release.

Action needed (1)

securitycriticalLinux security fixes for CVE-2026-43316
Linux receives security fixes associated with the listed CVEs, including CVE-2026-43316. The update ships in Flatcar LTS lts-4081.3.8.

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Flatcar Container Linuxstable-4593.2.1Provisioning & RuntimeMay 11, 2026

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This is a security-focused Flatcar release with disclosed Linux security fixes. It also updates the Linux and ca-certificates dependencies.

Action needed (1)

securitycriticalLinux security updates, including CVE-2026-31733
Linux receives security updates in Flatcar stable-4593.2.1, including CVE-2026-31733 and the other disclosed Linux advisories listed for this change.

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