mastodon 4.7.3Flatcar Container Linux is the leading community-driven, container-optimized, auto-updating Linux distribution.
Flatcar is unaffected by Copy Fail (CVE-2026-31431)!
The kernel option causing it was never enabled, because Flatcar is minimal by design and only ships what containers need
Sometimes the best mitigation is to reduce the attack surface by not shipping vulnerable components 🔒
📚 Big docs update on flatcar.org!
We restructured everything around task-based navigation: Getting Started, Provision, OS Config, System Extensions, Deploy (bare-metal / cloud / virt), Orchestrate, Diagnostics, Updates & Releases, Security, CoreOS Migration, and Dev Guide. The https://flatcar.org/releases page also got a full rebuild (https://github.com/flatcar/flatcar-website/pull/605).
This was a HUGE refactor, so broken links and other rough edges are inevitable. Please report them:
🐞 https://github.com/flatcar/Flatcar/issues
💬 https://discord.gg/PMYjFUsJyq
Thanks @CNCF, and personally Bruce Hamilton (gh: iRaindrop), Seth McEvoy (gh: mcevoy-building7), and Uchechukwu Obasi (gh: thisisobate), who also drove the releases-page refactor 🙏
📖 https://flatcar.org/docs/latest/
🛠️ Docs restructure: https://github.com/flatcar/flatcar-website/pull/599
🚨 Fresh Flatcar Alpha, Beta, and Stable releases are now out with Linux 6.12.87 and a large set of kernel security fixes.
The recently disclosed Linux “Dirty Frag” privilege escalation flaws are addressed in these releases.
New Flatcar Alpha, Beta and Stable releases now available!
📦 Many package updates: OpenSSH, Kernel, systemd
🔒 CVE fixes & security patches
🚀 Oracle Cloud Infrastructure support
📜 Release notes at the usual spot: https://www.flatcar.org/releases/
🚀 New Flatcar releases for all channels now available! 🚀
- Alpha 4694.0.1
- Beta 4628.1.2
- Stable 4593.2.2
- LTS-2024 4081.3.8
📦 Package updates: Linux 6.12.91 (Alpha/Beta/Stable), Linux 6.6.141 (LTS), ca-certificates 3.124
🔒 Security maintenance release for the recently disclosed kernel LPEs Fragnesia (CVE-2026-46300) and ssh-keysign-pwn (CVE-2026-46333), plus the usual kernel CVE roll-up
📜 Release notes at the usual spot: https://www.flatcar.org/releases/
🚀 Flatcar Container Linux releases across channels:
Alpha 4669.0.0 / Beta 4628.1.0 / Stable 4593.2.0 / LTS 4081.3.7.
🧩 Kernels: 6.12.81 (A/B/S) + 6.6.127 (LTS).
🔒 Security fixes + boot/initrd updates.
New Flatcar Container Linux releases are now available:
• Beta 4722.1.0
• Stable 4593.2.4
• LTS-2024 4081.3.9
Here’s what’s included in each release. 🧵