Nine‑Year Linux ptrace Flaw Exposes SSH Keys
🔒 A nine‑year logic flaw in the Linux kernel's ptrace path (CVE‑2026‑46333) lets unprivileged local users read sensitive files on default Debian, Fedora and Ubuntu installations. Qualys TRU found the bug in __ptrace_may_access(), exploitable when a privileged process drops credentials and remains briefly reachable; pidfd_getfd() expanded the attack surface. Upstream patches and distro updates are available; mitigations include raising kernel.yama.ptrace_scope to 2.
