Time-of-check Time-of-use (TOCTOU) Affecting python3-libmount-debuginfo package, versions <0:2.40.2-18.el10_2.20


Severity

Recommended
0.0
high
0
10

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.2% (10th percentile)

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  • Snyk IDSNYK-ROCKY10-PYTHON3LIBMOUNTDEBUGINFO-22188839
  • published4 Nov 2026
  • disclosed2 Sept 2026

Introduced: 2 Sep 2026

CVE-2026-78410  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:10 python3-libmount-debuginfo to version 0:2.40.2-18.el10_2.20 or higher.
This issue was patched in RLSA-2026:93461.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-libmount-debuginfo package and not the python3-libmount-debuginfo package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:10 relevant fixed versions and status.

A flaw was found in util-linux. Restricted bind mounts take the source path from fstab but do not pin that source before the privileged mount. A local unprivileged user who can replace the authorized source or a writable ancestor can redirect SUID mount(8) to bind another host directory. If the fstab entry also sets X-mount.owner, X-mount.group, or X-mount.mode, root then changes ownership or mode on that redirected inode.

CVSS Base Scores

version 3.1