CVE-2026-56109
ALSA Library < 1.2.16.1 Double-Free via parse_def() in conf.c
CVSS Score
6.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-415 |
| Vendor | alsa-project |
| Product | alsa-lib |
| Published | Jun 22, 2026 |
| Last Updated | Jun 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
alsa-project / alsa-lib
0 < 1.2.16.1
References
lore.kernel.org: https://lore.kernel.org/alsa-devel/CAGt8pqBU0p2voB+qHxWGcNJrKHAcBhAyHUUBPLBN-Yj_SiV6MQ@mail.gmail.com/ github.com: https://github.com/alsa-project/alsa-lib/releases/tag/v1.2.16.1 github.com: https://github.com/alsa-project/alsa-lib/commit/536dd6f8affdf5197c12a63a71c92a70b2833cc0 vulncheck.com: https://www.vulncheck.com/advisories/alsa-library-double-free-via-parse-def-in-conf-c
Credits
Dmitrijs Trizna of Aisle Research Luigino Camastra of Aisle Research Guido Vranken of Aisle Research Ze Sheng of Aisle Research