CVE-2026-56109 | The Advanced Linux Sound Architecture (ALSA) library before … | CVSS 6.8 MEDIUM

Description

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.

Metadata

CVE ID: CVE-2026-56109
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-18 19:15 UTC
Published: 2026-06-22 15:58 UTC
Last updated: 2026-06-22 17:29 UTC
Primary CWE: CWE-415
Double Free
Vendor / Product: alsa-project / alsa-lib
Sources: cve.org · NVD

Severity & Metrics

6.8 MEDIUM CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
alsa-project	alsa-lib	—	0 < 1.2.16.1

Weakness (CWE)

CWE	Source	Description
CWE-415	cna	Double Free

CVSS scores (2)

Score	Severity	Version	Source	Vector
7.0	HIGH	4.0	cna	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
6.8	MEDIUM	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

References (4)