Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-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 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.
Fixed packages 6
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | alsa-lib | 0:1.2.7.2-1.amzn2023.0.4 |
| Amazon Linux · 2023 | alsa-lib-debuginfo | 0:1.2.7.2-1.amzn2023.0.4 |
| Amazon Linux · 2023 | alsa-lib-debugsource | 0:1.2.7.2-1.amzn2023.0.4 |
| Amazon Linux · 2023 | alsa-lib-devel | 0:1.2.7.2-1.amzn2023.0.4 |
| Amazon Linux · 2023 | alsa-topology | 0:1.2.7.2-1.amzn2023.0.4 |
| Amazon Linux · 2023 | alsa-ucm | 0:1.2.7.2-1.amzn2023.0.4 |
Vulnerabilities 1
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Medium 6.8
ALSA Library < 1.2.16.1 Double-Free via parse_def() in conf.c
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 compou…
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2026-56109.html