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Ubuntu Security Notice USN-8044-2
June 09, 2026

alsa-lib vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

alsa-lib could be made to crash or run programs if it opened a specially
crafted file.

Software Description:
- alsa-lib: shared library for ALSA applications

Details:

USN-8044-1 fixed a vulnerability in alsa-lib. This update provides the
corresponding fix for alsa-lib on Ubuntu 20.04 LTS.

Original advisory details:

 It was discovered that alsa-lib incorrectly handled the topology mixer
 control decoder. A local attacker could use a specially crafted topology
 file to cause alsa-lib to crash, resulting in a denial of service, or
 possibly execute arbitrary code.

Update instructions:

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

Ubuntu 20.04 LTS
  libasound2                      1.2.2-2.1ubuntu2.5+esm1
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-8044-2
  https://ubuntu.com/security/notices/USN-8044-1
  CVE-2026-25068