CVE-2026-56109
ALSA Library < 1.2.16.1 Double-Free via parse_def() in conf.c
- State
- Published
- Severity
- 7.0 High
- Published
- Jun 22, 2026
- Updated
- Jul 14, 2026
- Reserved
- Jun 18, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.0 High | 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 | VulnCheck |
| 3.1 | 6.8 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H | VulnCheck |
Weaknesses
- CWE-415 Double Free
Affected Products
| Product | Versions |
|---|---|
alsa-libalsa-project |
|
References
- Researcher Disclosuretechnical-descriptionexploit
- Release Notesrelease-notes
- Patch Commitpatch
- https://www.vulncheck.com/advisories/alsa-library-double-free-via-parse-def-in-conf-cthird-party-advisory
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