USN-8701-1: UDisks vulnerability

Publication date

31 August 2026

Overview

UDisks could be made to run programs as an administrator.


Packages

  • 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.

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

After a standard system update you need to reboot your computer to 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
26.04 LTS resolute libudisks2-0 –  2.10.91-1ubuntu2.1
udisks2 –  2.10.91-1ubuntu2.1
24.04 LTS noble libudisks2-0 –  2.10.1-6ubuntu1.5
udisks2 –  2.10.1-6ubuntu1.5

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.


Have additional questions?

Talk to a member of the team ›