# CVE-2026-56109: alsa-lib: The Advanced Linux Sound Architecture (ALSA) library before 1.2.16.1 contains a double-free vulnerability in parse_de... CVE-2026-56109 is fixed in 13 products on 1 platform, first by libasound2-data 1.2.15.3-1ubuntu1.1, released June 22, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-56109 - Priority: Routine - CVSS: n/a (Medium) - EPSS: 0.0014 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 22, 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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | alsa opensuse-leap 16.0 | 1.2.14-160000.3.1 | [OPENSUSE-SU-2026:21075-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21075-1.md) | Jun 28, 2026 | | Linux | alsa sles 15.7 | 1.2.10-150600.4.3.1 | [SUSE-SU-2026:3270-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3270-1.md) | Jul 27, 2026 | | Linux | alsa sles 16.0 | 1.2.14-160000.3.1 | [SUSE-SU-2026:22381-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22381-1.md) | Jun 28, 2026 | | Linux | alsa-lib Debian 14 | 1.2.16.1-1 | [DEBIAN-CVE-2026-56109](https://patchblox.com/security/data/fix/linux/debian-cve-2026-56109.md) | Jul 3, 2026 | | Linux | alsa-lib amzn 2023 | 1.2.7.2-1.amzn2023.0.4 | [ALAS2023-2026-2082](https://patchblox.com/security/data/fix/linux/alas2023-2026-2082.md) | Aug 31, 2026 | | Linux | alsa-lib-debuginfo amzn 2023 | 1.2.7.2-1.amzn2023.0.4 | [ALAS2023-2026-2082](https://patchblox.com/security/data/fix/linux/alas2023-2026-2082.md) | Aug 31, 2026 | | Linux | alsa-lib-debugsource amzn 2023 | 1.2.7.2-1.amzn2023.0.4 | [ALAS2023-2026-2082](https://patchblox.com/security/data/fix/linux/alas2023-2026-2082.md) | Aug 31, 2026 | | Linux | alsa-lib-devel amzn 2023 | 1.2.7.2-1.amzn2023.0.4 | [ALAS2023-2026-2082](https://patchblox.com/security/data/fix/linux/alas2023-2026-2082.md) | Aug 31, 2026 | | Linux | alsa-topology amzn 2023 | 1.2.7.2-1.amzn2023.0.4 | [ALAS2023-2026-2082](https://patchblox.com/security/data/fix/linux/alas2023-2026-2082.md) | Aug 31, 2026 | | Linux | alsa-ucm amzn 2023 | 1.2.7.2-1.amzn2023.0.4 | [ALAS2023-2026-2082](https://patchblox.com/security/data/fix/linux/alas2023-2026-2082.md) | Aug 31, 2026 | | Linux | libasound2 Ubuntu 22.04.1 LTS (jammy) | 1.2.6.1-1ubuntu1.2 | [libasound2 1.2.6.1-1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libasound2-1.2.6.1-1ubuntu1.2.md) | Jul 18, 2026 | | Linux | libasound2-data Ubuntu 22.04.1 LTS (jammy) | 1.2.6.1-1ubuntu1.2 | [libasound2-data 1.2.6.1-1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libasound2-data-1.2.6.1-1ubuntu1.2.md) | Jul 18, 2026 | | Linux | libasound2-data Ubuntu 24.04.5 LTS (noble) | 1.2.11-1ubuntu0.3 | [libasound2-data 1.2.11-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libasound2-data-1.2.11-1ubuntu0.3.md) | Jul 18, 2026 | | Linux | libasound2-data Ubuntu 26.04.1 LTS (resolute) | 1.2.15.3-1ubuntu1.1 | [libasound2-data 1.2.15.3-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libasound2-data-1.2.15.3-1ubuntu1.1.md) | Jun 22, 2026 | | Linux | libasound2-plugin-smixer Ubuntu 22.04.1 LTS (jammy) | 1.2.6.1-1ubuntu1.2 | [libasound2-plugin-smixer 1.2.6.1-1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libasound2-plugin-smixer-1.2.6.1-1ubuntu1.2.md) | Jul 18, 2026 | | Linux | libasound2-plugin-smixer Ubuntu 24.04.5 LTS (noble) | 1.2.11-1ubuntu0.3 | [libasound2-plugin-smixer 1.2.11-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libasound2-plugin-smixer-1.2.11-1ubuntu0.3.md) | Jul 18, 2026 | | Linux | libasound2-plugin-smixer Ubuntu 26.04.1 LTS (resolute) | 1.2.15.3-1ubuntu1.1 | [libasound2-plugin-smixer 1.2.15.3-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libasound2-plugin-smixer-1.2.15.3-1ubuntu1.1.md) | Jun 22, 2026 | | Linux | libasound2t64 Ubuntu 24.04.5 LTS (noble) | 1.2.11-1ubuntu0.3 | [libasound2t64 1.2.11-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libasound2t64-1.2.11-1ubuntu0.3.md) | Jul 18, 2026 | | Linux | libasound2t64 Ubuntu 26.04.1 LTS (resolute) | 1.2.15.3-1ubuntu1.1 | [libasound2t64 1.2.15.3-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libasound2t64-1.2.15.3-1ubuntu1.1.md) | Jun 22, 2026 | | Linux | libatopology2 Ubuntu 22.04.1 LTS (jammy) | 1.2.6.1-1ubuntu1.2 | [libatopology2 1.2.6.1-1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libatopology2-1.2.6.1-1ubuntu1.2.md) | Jul 18, 2026 | | Linux | libatopology2t64 Ubuntu 24.04.5 LTS (noble) | 1.2.11-1ubuntu0.3 | [libatopology2t64 1.2.11-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libatopology2t64-1.2.11-1ubuntu0.3.md) | Jul 18, 2026 | | Linux | libatopology2t64 Ubuntu 26.04.1 LTS (resolute) | 1.2.15.3-1ubuntu1.1 | [libatopology2t64 1.2.15.3-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libatopology2t64-1.2.15.3-1ubuntu1.1.md) | Jun 22, 2026 | --- Data as of 2026-11-09T01:18:40Z UTC. 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