CVE-2026-76642 - util-linux libmount Privilege Escalation via Failed Mount Helper

CVE-2026-76642 - util-linux libmount Privilege Escalation via Failed Mount Helper

https://cvefeed.io/rssfeed/latest.atom / Thu, 09/03/2026 - 13:29
CVE ID :CVE-2026-76642
Published : Sept. 3, 2026, 10:54 a.m. | 9 minutes ago
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.
Severity: 8.5 | HIGH
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