Linux ‘Copy Fail’ flaw lets anyone hijack system privileges. Update ASAP

Security researchers are warning of a new “logic flaw” in Linux called Copy Fail (CVE-2026-31431), a critical vulnerability that poses a threat to all users running a Linux-based operating system.

Xint Code discovered the flaw in Linux’s authencesn cryptographic template, which “lets an unprivileged local user trigger a deterministic, controlled 4-byte write into the page cache of any readable file on the system.” In other words, anyone can potentially change the cached copy of any file...