HIGHCVSS 7.8Vulnerability
CVE-2026-76642
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.
Properties
- severity
- HIGH
- cvss_severity
- HIGH
- cvss_score
- 7.8
- retrieved_at
- 2026-09-25T15:10:08+00:00
- score
- 7.8
- last_source
- NVD
- cve_id
- CVE-2026-76642
- cvss_vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- signal_observed_at
- 2026-09-25T15:10:08+00:00
- vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- published_at
- 2026-09-03T13:06:08.440
- last_modified
- 2026-09-24T20:28:01.780
Related Entities (2)
DESCRIBED_BY (1)
→[Source]NVD
HAS_WEAKNESS (1)
→[Weakness]Detection of Error Condition Without Action
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