CVE-2026-35352 — uutils coreutils mkfifo Privilege Escalation via TOCTOU Race Condition
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 p…
Published: 2026-04-22 · CVSS: 7.0 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7