Critical kernel vulnerability affects a wide range of Linux distributions

A Linux kernel flaw, CVE-2026-31431, lets local attackers escalate to root on many distributions.

The bug affects a cryptographic component and can alter page cache behavior without relying on race conditions.

It is especially dangerous in multi-user systems, CI environments, and shared-kernel containers, where a local foothold can become full system access.

Debian, Ubuntu, SUSE, and Red Hat are rolling out fixes, while researchers including Theori are tracking the issue.