CVE-2026-25068: Alsa Project Alsa-Lib

Medium severity, CVSS 4.6. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Alsa Project Alsa-Lib: from 1.2.2, up to and including 1.2.15.2

Published 2026-01-29. Last modified 2026-06-17.