ALPINE-CVE-2026-53612

ALPINE-CVE-2026-53612

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 `hook_owner.c` post-mount hook performs path-based `chmod()` and `lchown()` operations on a previously validated mount target. A local low-privileged user authorized by an `/etc/fstab` entry with `user` or `users` and an `X-mount.mode`, `X-mount.owner`, or `X-mount.group` option can use `renameat2(RENAME_EXCHANGE)` to race a writable ancestor of the target and redirect the privileged ownership or mode change to a root-owned path, potentially gaining root privileges. This issue is fixed in 2.41.5 and 2.42.2.

CVSS 7.0 · High · Fix available

Published

2026-10-14T15:17:20.260Z

Updated

2026-10-15T10:30:07.767842171Z

Stack: system

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