AI-analyzed release notes for CNCF graduated and incubating projects.
This is primarily a security-focused Flatcar release with a large set of disclosed Linux fixes. It also includes a QEMU launcher performance correction and updates to Linux and ca-certificates dependencies.
Action needed (1)
securitycriticalLinux security fixes
Linux is updated with fixes for the disclosed advisories, including CVE-2023-52435, the CVE-2025-* and CVE-2026-* advisories listed for this release. The fixes ship in Flatcar lts-4081..
A security- and maintenance-focused release with updates to Linux and bundled components, along with dependency updates. It also corrects minimal-initrd regressions and changes service startup, SSH defaults, kernel-module availability, and other operator-visible behavior and layout.
Action needed (18)
securitycriticalLinux security updates
Linux was updated with security fixes associated with advisories including CVE-2024-56757, CVE-2025-71239, and CVE-2026-31788.
securityhighcurl security updates
curl was updated with fixes for CVE-2025-10148 and CVE-2025-9086.
securityhighexpat security update
expat was updated with a fix for CVE-2025-59375.
securityhighgnupg security updates
gnupg was updated with fixes for CVE-2025-68972 and CVE-2025-68973.
securityhighGo security updates
go was updated with security fixes associated with CVE-2025-47910, CVE-2025-47912, CVE-2025-58183, and related advisories.
securityhighintel-microcode security updates
intel-microcode was updated with fixes associated with CVE-2024-28956, CVE-2024-43420, CVE-2025-20012, and related advisories.
securityhighlibxslt security updates
libxslt was updated with fixes for CVE-2025-7424 and CVE-2025-7425.
securityhighnvidia-drivers security updates
nvidia-drivers was updated with fixes for CVE-2025-23280, CVE-2025-23282, CVE-2025-23300, and related advisories.
securityhighopenssl security updates
openssl was updated with fixes for CVE-2025-9230, CVE-2025-9231, and CVE-2025-9232.
securityhighPAM security updates
pam was updated with fixes for CVE-2024-10041, CVE-2024-10963, CVE-2024-22365, and CVE-2025-6020.
securitymediumbinutils security updates
binutils was updated with fixes for CVE-2025-5244, CVE-2025-5245, and CVE-2025-8225.
securitymediumcoreutils security update
coreutils was updated with a fix for CVE-2025-5278.
securitymediumlibpcre2 security update
libpcre2 was updated with a fix for CVE-2025-58050.
securitymediumnet-tools security update
net-tools was updated with a fix for CVE-2025-46836.
securitylowopenssh security updates
openssh was updated with fixes for CVE-2025-61984 and CVE-2025-61985.
securitylibxml2 update
libxml2 was updated to libxml2-20250908.
breakingOpenSSH algorithm configuration defaults
Ciphers, MACs, and KexAlgorithms were dropped from the sshd configuration. OpenSSH upstream defaults are used instead.
breakingReduced first-stage initrd kernel modules
The set of kernel modules available in the first initrd is reduced.
Check if affected (1)
breakingAutomatic startup for overlaybd sysext services
Applies if you use the overlaybd sysext.
Services in the overlaybd sysext were configured to start automatically.
