In summary: PCWorld reports that a critical Linux vulnerability called ‘Copy Fail’ (CVE-2026-31431) allows unprivileged users to hijack system privileges by altering cached files. This straight-line logic flaw affects all major Linux distributions and represents the most severe Linux threat since 2022’s Dirty Pipe vulnerability. Patches are available in Linux kernel versions 7.0 and 6.19.12, making immediate system updates essential for security. SNIP