CVE-2026-53614: high-severity vulnerability in util-linux
util-linux LIBMOUNT_FORCE_MOUNT2 allows nosuid and noexec bypass
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7epss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
util-linux is a random collection of Linux utilities. In util-linux 2.39.1 through 2.41.4 and 2.42 through 2.42.1, the SUID `mount` utility reads the attacker-controlled `LIBMOUNT_FORCE_MOUNT2` environment variable with `getenv()`, allowing a local low-privileged
user to force the non-atomic legacy bind-mount path. With an `/etc/fstab` bind mount authorized by `user` or `users` and protected by `nosuid`, `noexec`, or `nodev`, an attacker can race the window between the initial bind mount and the remount that applies those security flags and execute a SUID program from the temporarily unprotected mount, 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
util-linux · util-linuxRelated CVEs — util-linux
In the same product, most dangerous first.
CVE-2026-76642HIGHutil-linux libmount Privilege Escalation via Failed Mount HelperEPSS 0.2%CVE-2025-14104MEDIUMUtil-linux: util-linux: heap buffer overread in setpwnam() when processing 256-byte usernamesEPSS 0.2%CVE-2026-53615HIGHutil-linux libblkid DOS extended-partition overflow produces invalid partition metadataEPSS 0.2%CVE-2026-53613HIGHutil-linux mount target TOCTOU allows local privilege escalationEPSS 0.1%CVE-2026-27456MEDIUMutil-linux: TOCTOU Race Condition in util-linux mount(8) - Loop Device SetupEPSS 0.1%CVE-2026-53612HIGHutil-linux mount hook_owner TOCTOU allows local privilege escalationEPSS 0.1%
References
https://github.com/util-linux/util-linux/commit/31e37c1c7dcf25b76ccf41391fe934a75644c661https://github.com/util-linux/util-linux/commit/53ff0fcdab12d69c60c971c69a3d0d173fa46ca9https://github.com/util-linux/util-linux/commit/9cbfb823500f510b34767edabd3ffd5b436987b4https://github.com/util-linux/util-linux/commit/cc81bbcec598cb91f0eb8456282f33eed820ed5fhttps://github.com/util-linux/util-linux/commit/fd6b4d94ff013dc7ed680d4e864610da5b9751f1https://github.com/util-linux/util-linux/releases/tag/v2.41.5https://github.com/util-linux/util-linux/releases/tag/v2.42.2https://github.com/util-linux/util-linux/security/advisories/GHSA-67r7-8m5w-22wx