CVE-2026-31431 - Cybersec Sentinel

CVE-2026-31431

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Copy Fail, The Nine-Year Linux Kernel Flaw That Gives Any User Root in Seconds

Copy Fail, The Nine-Year Linux Kernel Flaw That Gives Any User Root in Seconds

GroupNo attributed threat actor. Vulnerability discovered by Xint Code (Theori). Public PoC released April 2026.TypeLocal Privilege Escalation (LPE), Linux Kernel Logic Flaw, Container Escape PrimitiveCVEsCVE-2026-31431 (Linux kernel algif_aead page-cache corruption enabling root access, CVSS 7.8)MalwareNo associated malware family. Public 732-byte Python PoC (copy_fail_exp.py)