CVE-2026-25068
Publication date 29 January 2026
Last updated 9 June 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
| Package | Ubuntu Release | Status |
|---|---|---|
| alsa-lib | 26.04 LTS resolute |
Fixed 1.2.15.3-1ubuntu1
|
| 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 |
Fixed 1.2.2-2.1ubuntu2.5+esm1
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
Get expanded security coverage with Ubuntu Pro
Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.
Get Ubuntu Pro 30-day free trialSeverity score breakdown
CVSS version: CVSS v4.0
Base score
4.6 · Medium
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
References
Related Ubuntu Security Notices (USN)
- USN-8044-1
- alsa-lib vulnerability
- 16 February 2026
- USN-8044-2
- alsa-lib vulnerability
- 9 June 2026