جزئیات آسیب‌پذیری

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mkfifo utility of uutils coreutils. The utility creates a FIFO and then performs a path-based chmod to set permissions. A local attacker with write access to the parent directory can swap the newly created FIFO for a symbolic link between these two operations. This redirects the chmod call to an arbitrary file, potentially enabling privilege escalation if the utility is run with elevated privileges.

• https://github.com/uutils/coreutils/issues/10020 issue-tracking
• http://www.openwall.com/lists/oss-security/2026/05/04/4
• http://www.openwall.com/lists/oss-security/2026/05/04/5
• http://www.openwall.com/lists/oss-security/2026/05/04/6