[USN-8102-2] snapd regression

[noreply+usn-bot at canonical.com]

==========================================================================
Ubuntu Security Notice USN-8102-2
March 17, 2026

snapd regression
==========================================================================

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

- Ubuntu 24.04 LTS

Summary:

USN-8102-1 introduced a regression in snapd

Software Description:
- snapd: Daemon and tooling that enable snap packages

Details:

USN-8102-1 fixed a vulnerability in snapd. The update caused a regresision for
Ubuntu 24.04 LTS while installing the package. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Qualys discovered that snapd incorrectly handled certain operations in the
snap's private /tmp directory. If systemd-tmpfiles is enabled to automatically
clean up this directory, a local attacker could possibly use this issue to
re-create the deleted directory, resulting in privilege escalation.

Update instructions:

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

Ubuntu 24.04 LTS
  snapd                           2.73+ubuntu24.04.2

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

References:
  https://ubuntu.com/security/notices/USN-8102-2
  https://ubuntu.com/security/notices/USN-8102-1
  CVE-2026-3888, https://launchpad.net/bugs/2144728

Package Information:
  https://launchpad.net/ubuntu/+source/snapd/2.73+ubuntu24.04.2
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