CVE-2026-56109
published 2026-06-22CVE-2026-56109: 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…
PriorityP429medium6.8CVSS 3.1
AVLACLPRNUINSUCNILAH
EPSS
0.14%
3.6th percentile
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
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| alsa-project | alsa-lib | < 1.2.16.1 | 1.2.16.1 |
| ubuntu | alsa-lib | — | — |
CVSS provenance
nvdv3.16.8MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
nvdv4.07.0HIGHCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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VulDB
alsa-project alsa-lib prior 1.2.16.1 src/conf.c parse_def double free
vuldb·2026-06-22·CVSS 6.8
CVE-2026-56109 [MEDIUM] alsa-project alsa-lib prior 1.2.16.1 src/conf.c parse_def double free
A vulnerability identified as problematic has been detected in alsa-project alsa-lib. Impacted is the function parse_def of the file src/conf.c. The manipulation leads to double free.
This vulnerability is listed as CVE-2026-56109. The attack must be carried out locally. There is no available exploit.
You should upgrade the affected component.
GHSA
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
ghsa_unreviewed·2026-06-22
CVE-2026-56109 [HIGH] CWE-415 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
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.
Ubuntu
alsa-lib vulnerability
vendor_ubuntu·2026-07-14
CVE-2026-56109 alsa-lib vulnerability
Title: alsa-lib vulnerability
Summary: alsa-lib could be made to crash or run programs as your login if it opened
a specially crafted file.
It was discovered that alsa-lib incorrectly handled certain ALSA
configuration text. An attacker could use this issue to cause alsa-lib to
crash, resulting in a denial of service, or possibly execute arbitrary
code.
Instructions: In general, a standard system update will make all the necessary changes.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/alsa-project/alsa-lib/commit/536dd6f8affdf5197c12a63a71c92a70b2833cc0https://github.com/alsa-project/alsa-lib/releases/tag/v1.2.16.1https://lore.kernel.org/alsa-devel/CAGt8pqBU0p2voB+qHxWGcNJrKHAcBhAyHUUBPLBN-Yj_SiV6MQ@mail.gmail.com/https://www.vulncheck.com/advisories/alsa-library-double-free-via-parse-def-in-conf-c
2026-06-22
Published