CVE-2026-56109: Alsa-Project Alsa-Lib

Medium severity, CVSS 6.8. EPSS: 0.1% chance of exploitation in the next 30 days.

The Advanced Linux Sound Architecture (ALSA) library before 1.2.16.1 contains a double-free vulnerability in parse_def() in src/conf.c that allows attackers to corrupt memory by supplying maliciously crafted ALSA configuration text. When parsing nested compound or array configuration blocks, parse_def() fails to check return values before continuing, causing snd_config_delete() to be called twice on the same already-freed node, resulting in a NULL-pointer write or invalid memory read.

Affected products

Published 2026-06-22. Last modified 2026-07-14.