Announcing new releases Alpha 4515.0.1, Beta 4459.1.2, Stable 4459.2.1

[Flatcar Container Linux User]

Hello,
We are pleased to announce a new Flatcar Container Linux release for the Alpha, Beta and Stable channels.

New Alpha Release 4515.0.1

Changes since Alpha 4515.0.0

Security fixes:

• Linux (CVE-2025-40177, CVE-2025-40176, CVE-2025-40172, CVE-2025-40173, CVE-2025-40166, CVE-2025-40167, CVE-2025-40165, CVE-2025-40162, CVE-2025-40133, CVE-2025-40095, CVE-2025-40094, CVE-2025-40093, CVE-2025-40092, CVE-2025-40090, CVE-2025-40088, CVE-2025-40105, CVE-2025-40104, CVE-2025-40103, CVE-2025-40101, CVE-2025-40100, CVE-2025-40099, CVE-2025-40096, CVE-2025-40087, CVE-2025-40085, CVE-2025-40040, CVE-2025-40106, CVE-2025-40084, CVE-2025-40211, CVE-2025-40209)

Bug fixes:

• Fixed SSSD startup failure by adding back LDB modules into the image, which got lost after a Samba update (Flatcar#1919)
• Fixed the loading of kernel modules from system extensions via udev (e.g. at boot time).(flatcar/scripts#3367)

Changes:

• Added Nutanix images (flatcar/scripts#3311)

Updates:

• Linux (6.12.58 (includes 6.12.57, 6.12.56, 6.12.55))

New Beta Release 4459.1.2

Changes since Beta 4459.1.1

Security fixes:

• Linux (CVE-2025-40177, CVE-2025-40176, CVE-2025-40172, CVE-2025-40173, CVE-2025-40166, CVE-2025-40167, CVE-2025-40165, CVE-2025-40162, CVE-2025-40133, CVE-2025-40095, CVE-2025-40094, CVE-2025-40093, CVE-2025-40092, CVE-2025-40090, CVE-2025-40088, CVE-2025-40105, CVE-2025-40104, CVE-2025-40103, CVE-2025-40101, CVE-2025-40100, CVE-2025-40099, CVE-2025-40096, CVE-2025-40087, CVE-2025-40085, CVE-2025-40040, CVE-2025-40106, CVE-2025-40084, CVE-2025-40211, CVE-2025-40209)

Bug fixes:

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

Changes:

• Added Nutanix images (flatcar/scripts#3311)

Updates:

• Linux (6.12.58 (includes 6.12.57, 6.12.56, 6.12.55))

New Stable Release 4459.2.1

Changes since Stable 4459.2.0

Security fixes:

• Linux (CVE-2025-40177, CVE-2025-40176, CVE-2025-40172, CVE-2025-40173, CVE-2025-40166, CVE-2025-40167, CVE-2025-40165, CVE-2025-40162, CVE-2025-40133, CVE-2025-40095, CVE-2025-40094, CVE-2025-40093, CVE-2025-40092, CVE-2025-40090, CVE-2025-40088, CVE-2025-40105, CVE-2025-40104, CVE-2025-40103, CVE-2025-40101, CVE-2025-40100, CVE-2025-40099, CVE-2025-40096, CVE-2025-40087, CVE-2025-40085, CVE-2025-40040, CVE-2025-40106, CVE-2025-40084, CVE-2025-40211, CVE-2025-40209)

Bug fixes:

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

Changes:

• Added Nutanix images (flatcar/scripts#3311)

Updates:

• Linux (6.12.58 (includes 6.12.57, 6.12.56, 6.12.55))

Best,
The Flatcar Container Linux Maintainers