Linux Copy Fail CVE-2026-31431: KEV Privilege Escalation on Shared Build Hosts
CISA added Linux kernel CVE-2026-31431 to KEV on 2026-05-01. Theori's Copy Fail research ties the bug to AF_ALG AEAD in-place operation and shows why shared CI runners, Kubernetes nodes, and multi-tenant Linux hosts need kernel patch proof or AF_ALG mitigation.