[USN-8701-1] UDisks vulnerability

[noreply+usn-bot at canonical.com]

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Ubuntu Security Notice USN-8701-1
August 31, 2026

udisks2 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS

Summary:

UDisks could be made to run programs as an administrator.

Software Description:
- udisks2: service to access and manipulate storage devices

Details:

It was discovered that UDisks did not correctly validate the caller
identity when handling the as-user option in the
org.freedesktop.UDisks2.Filesystem.Mount() D-Bus method. A local attacker
with an active console session could possibly use this issue to mount
filesystems on behalf of arbitrary users, including privileged accounts,
leading to local privilege escalation.

Update instructions:

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

Ubuntu 26.04 LTS
  libudisks2-0                    2.10.91-1ubuntu2.1
  udisks2                         2.10.91-1ubuntu2.1

Ubuntu 24.04 LTS
  libudisks2-0                    2.10.1-6ubuntu1.5
  udisks2                         2.10.1-6ubuntu1.5

After a standard system update you need to reboot your computer to make all
the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-8701-1
  CVE-2026-7867

Package Information:
  https://launchpad.net/ubuntu/+source/udisks2/2.10.91-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/udisks2/2.10.1-6ubuntu1.5
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