CVE-2026-31431. 100% Reliable Linux LPE — no race, no per-distro offsets, page-cache write that bypasses on-disk file-integrity tools and crosses containers. Found by Xint Code.
It looks like the fix is just disabling the algif_aead kernel module. That prevented the proof of concept script from working on everything I tested it on. Hopefully they will get some kernel updates out soon.
It looks like the fix is just disabling the algif_aead kernel module. That prevented the proof of concept script from working on everything I tested it on. Hopefully they will get some kernel updates out soon.
They have shipped out an update mitigation for the issue. http://ubuntu.com/blog/copy-fail-vulnerability-fixes-available
sudo apt update && sudo apt upgradeand after that, also do the steps listed on that page for running
rmmodand grepping for the affected module unloaded