CVE-2026-7867: Udisks2: udisks2: local privilege escalation via as-user option spoofing

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-06 · updated 2026-09-08
Weakness: CWE-863

Description

A flaw was found in udisks2. A local attacker with an active console session can exploit insufficient authorization checking on the 'as-user' option in the org.freedesktop.UDisks2.Filesystem.Mount() D-Bus method. This allows the attacker to spoof the 'as-user' parameter, mounting filesystems on behalf of arbitrary users, including privileged accounts. This can lead to local privilege escalation through mount point injection and manipulation of the mount namespace visible to privileged users.

Affected products

Red Hat Enterprise Linux 10: all versions — fixed in 0:2.11.0-2.el10_2.1
Red Hat Enterprise Linux 10.0 Extended Update Support: all versions — fixed in 0:2.10.90-5.el10_0.3

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 0:2.11.0-2.el10_2.1; Red Hat Enterprise Linux 10.0 Extended Update Support 0:2.10.90-5.el10_0.3. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-7867 or the next vulnerability affects your stack