VULNERABILITY INTELLIGENCE
CVE-2026-76642
CVSS score7.8 HIGH
EPSS probability0.22%
CISA KEVNot currently listed
Published2026-09-03
Last modified2026-09-24
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description
util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with inherited suid bits or modify target inode permissions after a helper fails, achieving privilege escalation.
Weakness classification
- disclosure@vulncheck.com: CWE-390