May 7, 2026
By Rodrigo Luna
CVE-2026-31431: Exploitable Kernel Flaw Enables Silent Privilege Escalation
CVE-2026-31431 (“Copy Fail”) is a high-severity Linux kernel vulnerability that enables silent local privilege escalation through improper handling in the crypto subsystem. By abusing AF_ALG and splice operations, attackers can manipulate in-memory representations of privileged binaries to achieve reliable root-level code execution without leaving traditional file-based indicators behind.