Tech Apr 30, 2026 8 min Linux Kernel Copy Fail (CVE-2026-31431) Rewrites the Page Cache to Get Root CVE-2026-31431 Copy Fail is a Linux kernel local privilege escalation bug that lets an unprivileged user write 4 controlled bytes into the page cache via AF_ALG + algif_aead. On containers and CI runners it turns into host compromise. Linux セキュリティ CVE カーネル コンテナ
