Double Free Affecting alsa-lib package, versions <1.2.16.1-1


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.14% (3rd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-ALSALIB-17400945
  • published23 Jun 2026
  • disclosed22 Jun 2026

Introduced: 22 Jun 2026

CVE-2026-56109  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

Upgrade Debian:unstable alsa-lib to version 1.2.16.1-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream alsa-lib package and not the alsa-lib package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1