CVE-2026-31431 ("Copy Fail") Toolkit Skill by ara.so — Daily 2026 Skills collection. A Python toolkit for detecting and demonstrating CVE-2026-31431, a Linux kernel vulnerability where with performs an in-place AEAD operation via , writing into page-cache pages of regular files — enabling an unprivileged user to corrupt the kernel's in-memory view of or other world-readable files for local privilege escalation. Authorization notice: Use only on systems you own or are explicitly engaged to assess. Running this on unauthorized systems is illegal in most jurisdictions. Affected Systems - Linux k…