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Alpaquita LinuxStreamSecurity Advisory
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CVE-2026-53614

Published: June 19, 2026Last modified: August 5, 2026

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.

Severity score breakdown

ParameterValue
Base score7
Attack VectorLOCAL
Attack complexityHIGH
Privileges requiredLOW
User interactionNONE
ScopeUNCHANGED
ConfidentialityHIGH
Integrity impactHIGH
Availability impactHIGH
VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Status

ProductReleasePackageStatus
Alpaquita Linux23 LTSutil-linuxNot affected (2.38.1-r2)
25 LTSutil-linuxFixed (2.41.5-r0)
Streamutil-linuxFixed (2.42.2-r0)
Hardened Containers23 LTSutil-linuxNot affected (2.38.1-r2)
25 LTSutil-linuxFixed (2.41.5-r0)
Streamutil-linuxFixed (2.42.2-r0)

References

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