HighFix available
alsa-lib — security advisory
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.
- Products
- alsa-lib
- Affected versions
- 1.2.10-1, 1.2.10-2, 1.2.10-3, 1.2.10-3.1, 1.2.10-3.1~exp1, 1.2.10-3.1~exp2, 1.2.10-3.2, 1.2.11-1, 1.2.12-1, 1.2.13-1, 1.2.14-1, 1.2.14-1+deb13u1, 1.2.14-2, 1.2.15-1, 1.2.15-2, 1.2.15.1-1, 1.2.15.3-1, 1.2.16-1, 1.2.16.1-1, 1.2.16.1-1~bpo13+1, 1.2.16.1-2, 1.2.8-1, 1.2.9-1, 1.2.9-2
- Fixed versions
- 1.2.16.1-1
- CVEs
- CVE-2026-56109
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:17 UTC · Revision 2
Source evidence
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.
osv:DEBIAN-CVE-2026-56109
alsa-lib
Fixed versions: Not specified
alsa-lib
Fixed versions: Not specified
alsa-lib
Fixed versions: 1.2.16.1-1
Complete source record
{
"id": "bc1191f7c23bd3d55da32403e3813b243941e836b5552e6898189b7588e534f1",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-56109",
"method": "structured",
"payload": {
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"title": "DEBIAN-CVE-2026-56109",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2026-56109",
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{
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"severity": "high",
"structured": {
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"aliases": [
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"metrics": [
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],
"modified": "2026-10-26T11:47:33.530932078Z",
"provider": "osv",
"upstream": [
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],
"references": [
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]
},
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},
"source_id": "core-osv",
"document_id": 450793,
"published_at": "2026-06-22T18:16:48.557+00:00"
}