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.
Published: 2026-10-14
Score: 7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6442-1 util-linux security update
Ubuntu USN Ubuntu USN USN-8702-1 util-linux vulnerabilities
History

Wed, 14 Oct 2026 16:00:00 +0000

Type Values Removed Values Added
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.
Title util-linux LIBMOUNT_FORCE_MOUNT2 allows nosuid and noexec bypass
Weaknesses CWE-269
CWE-807
References
Metrics cvssV3_1

{'score': 7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-14T15:40:53.674Z

Reserved: 2026-06-09T19:39:52.405Z

Link: CVE-2026-53614

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-14T16:17:45.930

Modified: 2026-10-14T16:17:45.930

Link: CVE-2026-53614

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses
  • CWE-269

    Improper Privilege Management

  • CWE-807

    Reliance on Untrusted Inputs in a Security Decision