CVE-2026-53614

Name	CVE-2026-53614
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-6442-1
Debian Bugs	1140196

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
util-linux (PTS)	bookworm	2.38.1-5+deb12u3	fixed
	bookworm (security)	2.38.1-5+deb12u1	fixed
	trixie (security), trixie	2.41.5-0+deb13u1	fixed
	forky, sid	2.42.4-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
util-linux	source	bullseye	(not affected)
util-linux	source	bookworm	(not affected)
util-linux	source	trixie	2.41.5-0+deb13u1	DSA-6442-1
util-linux	source	(unstable)	2.42.2-1		1140196

Notes

[bookworm] - util-linux <not-affected> (Vulnerable code introduced later)
[bullseye] - util-linux <not-affected> (Vulnerable code introduced later)
https://github.com/util-linux/util-linux/security/advisories/GHSA-67r7-8m5w-22wx
Fixed by: https://github.com/util-linux/util-linux/commit/31e37c1c7dcf25b76ccf41391fe934a75644c661 (v2.42.2)
Fixed by: https://github.com/util-linux/util-linux/commit/cc81bbcec598cb91f0eb8456282f33eed820ed5f (v2.41.5)