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[USN-8938-1] cifs-utils vulnerability

Posted on 19 October 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8938-1
October 19, 2026

cifs-utils vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.10
- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

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

Software Description:
- 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.

Update instructions:

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

Ubuntu 26.10
cifs-utils 2:7.4-1ubuntu3.1

Ubuntu 26.04 LTS
cifs-utils 2:7.4-1ubuntu0.26.04.4

Ubuntu 24.04 LTS
cifs-utils 2:7.0-2ubuntu0.6

Ubuntu 22.04 LTS
cifs-utils 2:6.14-1ubuntu0.7

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

References:
https://ubuntu.com/security/notices/USN-8938-1
CVE-2026-104715

Package Information:
https://launchpad.net/ubuntu/+source/cifs-utils/2:7.4-1ubuntu3.1
https://launchpad.net/ubuntu/+source/cifs-utils/2:7.4-1ubuntu0.26.04.4
https://launchpad.net/ubuntu/+source/cifs-utils/2:7.0-2ubuntu0.6
https://launchpad.net/ubuntu/+source/cifs-utils/2:6.14-1ubuntu0.7

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