Severe Linux Copy Fail security flaw uncovered using AI scanning help

Nearly every Linux distribution released since 2017 is currently vulnerable to a security bug called "Copy Fail" that allows any user to give themselves administrator privileges. The exploit, publicly disclosed as CVE-2026-31431 on Wednesday, uses a Python script that works across all of the vulnerable Linux distributions, requiring "no per-distro offsets, no version checks, no recompilation," according to Theori, the security firm that uncovered it. Ars Technica points out this blog post where