CVE-2026-53612
highutil-linux is a random collection of Linux utilities.
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:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/util-linux/util-linux/commit/24da33905c7115c4cbccd0afb2a469804e96467a security-advisories@github.com
- https://github.com/util-linux/util-linux/commit/722c96974dd4009a334e4aee556eedaab5fb94b4 security-advisories@github.com
- https://github.com/util-linux/util-linux/commit/897a08c2b11dfa66975c3d24d63c7bf5f5be1a7c security-advisories@github.com
- https://github.com/util-linux/util-linux/commit/d0c5adaeb3a3d823aba1377794de8f009b8152cc security-advisories@github.com
- https://github.com/util-linux/util-linux/releases/tag/v2.41.5 security-advisories@github.com
- https://github.com/util-linux/util-linux/releases/tag/v2.42.2 security-advisories@github.com
- https://github.com/util-linux/util-linux/security/advisories/GHSA-g8wm-75wr-g2vh security-advisories@github.com
- https://github.com/util-linux/util-linux/security/advisories/GHSA-g8wm-75wr-g2vh 134c704f-9b21-4f2e-91b3-4a467353bcc0