732 Bytes to Root: Copy Fail Turns the Kernel’s Crypto Subsystem Against Itself
The Deterministic Failure of Kernel Cryptography CVE-2026-31431, known as Copy Fail, represents a significant departure from the typical, often unstable, landscape of local privilege escalation (LPE) exploits. Published on April 22, 2026, and subsequently added to the CISA Known Exploited Vulnerabilities catalog on May 1, 2026, this vulnerability targets the Linux kernel’s cryptographic subsystem. Specifically,…