CVE-2026-78410

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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:63162
https://access.redhat.com/security/cve/CVE-2026-78410
https://bugzilla.redhat.com/show_bug.cgi?id=2522684
https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m
https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-02 16:17

Updated : 2026-09-04 19:17

NVD link : CVE-2026-78410

Mitre link : CVE-2026-78410

CVE.ORG link : CVE-2026-78410

JSON object : View

Products Affected

No product.

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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