CVE-2026-53612

util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID mount utility's hookowner.c post-mount hook performs path-based chmod and lchown operations on a previously validated mount target. A local low-privileged user authorized by a...

CVE-2026-53612

The util-linux SUID mount utility is vulnerable to a Time-of-Check Time-of-Use (TOCTOU) race condition in the hook_owner.c post-mount hook. In versions 2.39 through 2.41.4 and 2.42 through 2.42.1 , the utility performs path-based chmod() and lchown() operations on a previously validated mount tar...

CVE-2026-53612 util-linux mount hook_owner TOCTOU allows local privilege escalation

util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID mount utility's hookowner.c post-mount hook performs path-based chmod and lchown operations on a previously validated mount target. A local low-privileged user authorized by a...

EUVD-2026-101123

util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID mount utility's hookowner.c post-mount hook performs path-based chmod and lchown operations on a previously validated mount target. A local low-privileged user authorized by a...