CVE-2026-25068

Publication date 29 January 2026

Last updated 16 February 2026

Ubuntu priority

Description

alsa-lib versions 1.2.2 up to and including 1.2.15.2, prior to commit 5f7fe33, contain a heap-based buffer overflow in the topology mixer control decoder. The tplg_decode_control_mixer1() function reads the num_channels field from untrusted .tplg data and uses it as a loop bound without validating it against the fixed-size channel array (SND_TPLG_MAX_CHAN). A crafted topology file with an excessive num_channels value can cause out-of-bounds heap writes, leading to a crash.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
alsa-lib	25.10 questing	Fixed 1.2.14-1ubuntu1.1
	24.04 LTS noble	Fixed 1.2.11-1ubuntu0.2
	22.04 LTS jammy	Fixed 1.2.6.1-1ubuntu1.1
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Needs evaluation

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
alsa-lib	Upstream: 5f7fe33

References

Related Ubuntu Security Notices (USN)

USN-8044-1
alsa-lib vulnerability
16 February 2026