USN-8938-1: cifs-utils vulnerability

Publication date

19 October 2026

Overview

cifs-utils could be made to run programs as an administrator.


Packages

  • cifs-utils - Common Internet File System utilities

Details

It was discovered that cifs-utils incorrectly handled credentials files
used by privileged mount.cifs invocations. A local attacker could
possibly use this issue to inject arbitrary mount options into a
privileged mount, resulting in a privilege escalation.

It was discovered that cifs-utils incorrectly handled credentials files
used by privileged mount.cifs invocations. A local attacker could
possibly use this issue to inject arbitrary mount options into a
privileged mount, resulting in a privilege escalation.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
26.10 stonking cifs-utils –  2:7.4-1ubuntu3.1
26.04 LTS resolute cifs-utils –  2:7.4-1ubuntu0.26.04.4
24.04 LTS noble cifs-utils –  2:7.0-2ubuntu0.6
22.04 LTS jammy cifs-utils –  2:6.14-1ubuntu0.7

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