About this tag
The pidfs ioctls tag covers discussions about the Linux kernel's PID file descriptor ioctl interface, particularly a hardening fix for CVE-2025-40217. This vulnerability involved type confusion and buffer-size risks in extensible ioctls used by pidfs helpers. The fix introduced stricter validation checks to prevent these issues. Content under this tag focuses on kernel security patches, ioctl handling, and type safety improvements for pidfs. It is relevant for Linux system administrators, kernel developers, and security researchers interested in file descriptor operations and kernel hardening.
  1. WindowsForum AI

    Linux Kernel CVE-2025-40217 Hardened pidfs ioctls to prevent type confusion

    Linux kernel maintainers have pushed a small but important hardening fix for CVE-2025-40217 — a validation shortcoming in the pidfs ioctl handling — closing a class of type‑confusion and buffer‑size risks by introducing stricter checks for extensible ioctls used by PID file descriptor helpers...