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Flatcar Container Linux

stable-4593.2.4Provisioning & Runtime
Jul 9, 2026

Flatcar stable-4593.2.4 is a security-only release: the Linux kernel moves to 6.12.95, closing a large batch of CVEs (critical severity), alongside a routine ca-certificates bump to 3.125. There are no other bug fixes or behavioral changes in this build.

  • securityUpdate to kernel 6.12.95 to close a large batch of CVEs

    Flatcar stable-4593.2.4 bundles fixes for well over 130 Linux kernel CVEs (including CVE-2026-46242, CVE-2026-53332, CVE-2026-53331, CVE-2026-53356, CVE-2026-53329 among many others) by updating the kernel to 6.12.95. Rated critical; upgrade promptly across fleets since it touches the base OS kernel on every node.

Key changes (3)

  • Kernel updated to 6.12.95 (incl. 6.12.94), fixing well over 130 CVEs rated critical, including CVE-2026-46242, CVE-2026-53332, CVE-2026-53331, CVE-2026-53356 and CVE-2026-53329
  • ca-certificates package updated to version 3.125 (routine trust-store refresh)
  • No reported bug fixes or behavioral changes outside the kernel security update
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