CVE catalog
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
- Severity
- High · CVSS 7
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.14% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | alsa-lib | sid | 1.2.16.1-2 | fixed |
| Debian | alsa-lib | forky | 1.2.16.1-2 | fixed |
| Debian | alsa-lib | trixie | 1.2.14-1+deb13u1 | vulnerable |
| Debian | alsa-lib | bookworm | 1.2.8-1 | vulnerable |
| Cpe | alsa-lib | Not reported | Not reported | vulnerable |
| Cpe | alsa-lib | Not reported | 1.2.11-1ubuntu0.3 | fixed |
| Cpe | libasound2-data | Not reported | 1.2.11-1ubuntu0.3 | fixed |
| Cpe | libasound2-dev | Not reported | 1.2.11-1ubuntu0.3 | fixed |
| Cpe | libasound2-doc | Not reported | 1.2.11-1ubuntu0.3 | fixed |
| Cpe | libasound2-plugin-smixer | Not reported | 1.2.11-1ubuntu0.3 | fixed |
| Cpe | libasound2t64 | Not reported | 1.2.11-1ubuntu0.3 | fixed |
| Cpe | libatopology-dev | Not reported | 1.2.11-1ubuntu0.3 | fixed |
| Cpe | libatopology2t64 | Not reported | 1.2.11-1ubuntu0.3 | fixed |
| Suse | alsa | linux enterprise micro 5.5 | 1.2.8-150500.3.3.1 | fixed |
| Suse | alsa | linux enterprise module for basesystem 15 sp7 | 1.2.10-150600.4.3.1 | fixed |
| Suse | alsa | linux micro 6.1 | 1.2.10-slfo.1.1_2.1 | fixed |
| Ubuntu | alsa-lib | 22.04 | 1.2.4-1.1ubuntu3 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.4-1.1ubuntu4 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.5.1-1ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.6.1-1ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.6.1-1ubuntu1.1 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.6.1-1ubuntu1.2 | fixed |
| Ubuntu | alsa-lib | 24.04 | 1.2.9-2 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.10-1 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.10-2 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.10-3 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.10-3build1 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.11-1build1 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.11-1build2 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.11-1ubuntu0.1 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.11-1ubuntu0.2 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.11-1ubuntu0.3 | fixed |
| Ubuntu | alsa-lib | 26.04 | 1.2.14-1ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.14-2ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15-2 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15.1-1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15.3-1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15.3-1build1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15.3-1ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15.3-1ubuntu1.1 | fixed |
| Ubuntu | alsa-lib | 14.04 | 1.0.27.2-1ubuntu6 | vulnerable |
| Ubuntu | alsa-lib | 14.04 | 1.0.27.2-1ubuntu7 | vulnerable |
| Ubuntu | alsa-lib | 14.04 | 1.0.27.2-3ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 14.04 | 1.0.27.2-3ubuntu2 | vulnerable |
| Ubuntu | alsa-lib | 14.04 | 1.0.27.2-3ubuntu5 | vulnerable |
| Ubuntu | alsa-lib | 14.04 | 1.0.27.2-3ubuntu6 | vulnerable |
| Ubuntu | alsa-lib | 14.04 | 1.0.27.2-3ubuntu7 | vulnerable |
| Ubuntu | alsa-lib | 16.04 | 1.0.29-0ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 16.04 | 1.1.0-0ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 18.04 | 1.1.3-5 | vulnerable |
| Ubuntu | alsa-lib | 18.04 | 1.1.3-5ubuntu0.1 | vulnerable |
| Ubuntu | alsa-lib | 18.04 | 1.1.3-5ubuntu0.2 | vulnerable |
| Ubuntu | alsa-lib | 18.04 | 1.1.3-5ubuntu0.4 | vulnerable |
| Ubuntu | alsa-lib | 18.04 | 1.1.3-5ubuntu0.5 | vulnerable |
| Ubuntu | alsa-lib | 18.04 | 1.1.3-5ubuntu0.6 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.1.9-0ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.1.2-2ubuntu2 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.2-2ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.2-2.1 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.2-2.1ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.2-2.1ubuntu2 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.2-2.1ubuntu2.1 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.2-2.1ubuntu2.2 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.2-2.1ubuntu2.3 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.2-2.1ubuntu2.4 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.2-2.1ubuntu2.5 | vulnerable |
| Ubuntu | alsa-lib | pro | 1.2.2-2.1ubuntu2.5+esm1 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.4-1.1ubuntu3 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.4-1.1ubuntu4 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.5.1-1ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.6.1-1ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.6.1-1ubuntu1.1 | vulnerable |
| Ubuntu | alsa-lib | 22.04 | 1.2.6.1-1ubuntu1.2 | fixed |
| Ubuntu | alsa-lib | 24.04 | 1.2.9-2 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.10-1 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.10-2 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.10-3 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.10-3build1 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.11-1build1 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.11-1build2 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.11-1ubuntu0.1 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.11-1ubuntu0.2 | vulnerable |
| Ubuntu | alsa-lib | 24.04 | 1.2.11-1ubuntu0.3 | fixed |
| Ubuntu | alsa-lib | 25.10 | 1.2.13-1build1 | vulnerable |
| Ubuntu | alsa-lib | 25.10 | 1.2.14-1 | vulnerable |
| Ubuntu | alsa-lib | 25.10 | 1.2.14-1ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 25.10 | 1.2.14-1ubuntu1.1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.14-1ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.14-2ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15-2 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15.1-1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15.3-1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15.3-1build1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15.3-1ubuntu1 | vulnerable |
| Ubuntu | alsa-lib | 26.04 | 1.2.15.3-1ubuntu1.1 | fixed |
| Suse | alsa | linux enterprise micro 5.3 | 1.2.6.1-150400.3.3.1 | fixed |
| Suse | alsa | linux enterprise micro 5.4 | 1.2.6.1-150400.3.3.1 | fixed |
| Suse | alsa | linux enterprise server 16.0 | 1.2.14-160000.3.1 | fixed |
| Suse | alsa | linux enterprise server for sap applications 16.0 | 1.2.14-160000.3.1 | fixed |
| Suse | alsa | linux micro 6.2 | 1.2.14-160000.3.1 | fixed |
| Opensuse | alsa | leap 16.0 | 1.2.14-160000.3.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | alsa-lib | source | sid | 1.2.16.1-1 | unimportant | Not reported | Not reported |
| Debian | alsa-lib | source | forky | 1.2.16.1-1 | unimportant | Not reported | Not reported |
| Debian | alsa-lib | source | trixie | (unfixed) | unimportant | Not reported | Not reported |
| Debian | alsa-lib | source | bookworm | (unfixed) | unimportant | Not reported | Not reported |
| Cpe | alsa-lib | cpe | Not reported | 1.2.11-1ubuntu0.3 | Not reported | Not reported | Not reported |
| Cpe | libasound2-data | cpe | Not reported | 1.2.11-1ubuntu0.3 | Not reported | Not reported | Not reported |
| Cpe | libasound2-dev | cpe | Not reported | 1.2.11-1ubuntu0.3 | Not reported | Not reported | Not reported |
| Cpe | libasound2-doc | cpe | Not reported | 1.2.11-1ubuntu0.3 | Not reported | Not reported | Not reported |
| Cpe | libasound2-plugin-smixer | cpe | Not reported | 1.2.11-1ubuntu0.3 | Not reported | Not reported | Not reported |
| Cpe | libasound2t64 | cpe | Not reported | 1.2.11-1ubuntu0.3 | Not reported | Not reported | Not reported |
| Cpe | libatopology-dev | cpe | Not reported | 1.2.11-1ubuntu0.3 | Not reported | Not reported | Not reported |
| Cpe | libatopology2t64 | cpe | Not reported | 1.2.11-1ubuntu0.3 | Not reported | Not reported | Not reported |
| Suse | alsa | rpm | linux enterprise micro 5.5 | 1.2.8-150500.3.3.1 | Not reported | SUSE-SU-2026:3492-1 | Not reported |
| Suse | alsa | rpm | linux enterprise module for basesystem 15 sp7 | 1.2.10-150600.4.3.1 | Not reported | SUSE-SU-2026:3270-1 | Not reported |
| Suse | alsa | rpm | linux micro 6.1 | 1.2.10-slfo.1.1_2.1 | Not reported | SUSE-SU-2026:22667-1 | Not reported |
| Ubuntu | alsa-lib | deb | 22.04 | 1.2.6.1-1ubuntu1.2 | Not reported | USN-8538-1 | Not reported |
| Ubuntu | alsa-lib | deb | 24.04 | 1.2.11-1ubuntu0.3 | Not reported | USN-8538-1 | Not reported |
| Ubuntu | alsa-lib | deb | 26.04 | 1.2.15.3-1ubuntu1.1 | Not reported | USN-8538-1 | Not reported |
| Ubuntu | alsa-lib | deb | 22.04 | 1.2.6.1-1ubuntu1.2 | Not reported | UBUNTU-CVE-2026-56109 | Not reported |
| Ubuntu | alsa-lib | deb | 24.04 | 1.2.11-1ubuntu0.3 | Not reported | UBUNTU-CVE-2026-56109 | Not reported |
| Ubuntu | alsa-lib | deb | 26.04 | 1.2.15.3-1ubuntu1.1 | Not reported | UBUNTU-CVE-2026-56109 | Not reported |
| Suse | alsa | rpm | linux enterprise micro 5.3 | 1.2.6.1-150400.3.3.1 | Not reported | SUSE-SU-2026:2885-1 | Not reported |
| Suse | alsa | rpm | linux enterprise micro 5.4 | 1.2.6.1-150400.3.3.1 | Not reported | SUSE-SU-2026:2885-1 | Not reported |
| Suse | alsa | rpm | linux enterprise server 16.0 | 1.2.14-160000.3.1 | Not reported | SUSE-SU-2026:22381-1 | Not reported |
| Suse | alsa | rpm | linux enterprise server for sap applications 16.0 | 1.2.14-160000.3.1 | Not reported | SUSE-SU-2026:22381-1 | Not reported |
| Suse | alsa | rpm | linux micro 6.2 | 1.2.14-160000.3.1 | Not reported | SUSE-SU-2026:22291-1 | Not reported |
| Opensuse | alsa | rpm | leap 16.0 | 1.2.14-160000.3.1 | Not reported | OPENSUSE-SU-2026:21075-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libasound2]Affected
Source package: [alsa-lib]
Details (2)
1.2.8-1+b1· amd64 · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
1.2.8-1+b1· arm64 · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
- [libasound2-data]Affected
Source package: [alsa-lib]
Details (2)
1.2.8-1· all · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
1.2.8-1· all · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
- [libasound2-dev]Affected
Source package: [alsa-lib]
Details (2)
1.2.8-1+b1· amd64 · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
1.2.8-1+b1· arm64 · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
- [libasound2-doc]Affected
Source package: [alsa-lib]
Details (2)
1.2.8-1· all · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
1.2.8-1· all · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
- [libasound2-plugin-smixer]Affected
Source package: [alsa-lib]
Details (2)
1.2.8-1+b1· amd64 · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
1.2.8-1+b1· arm64 · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
- [libatopology2]Affected
Source package: [alsa-lib]
Details (2)
1.2.8-1+b1· amd64 · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
1.2.8-1+b1· arm64 · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
- [libatopology-dev]Affected
Source package: [alsa-lib]
Details (2)
1.2.8-1+b1· amd64 · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
1.2.8-1+b1· arm64 · bookwormAffected
nvd · alsa-lib · debian · bookworm; nvd · alsa-lib · debian · 12
[Debian 13 (Trixie)]
- [libasound2-data]Affected
Source package: [alsa-lib]
Details (4)
1.2.14-1· all · trixieAffected
nvd · alsa-lib · debian · 13
1.2.14-1· all · trixieAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· all · trixie-backportsAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· all · trixie-backportsAffected
nvd · alsa-lib · debian · 13
- [libasound2-dev]Affected
Source package: [alsa-lib]
Details (4)
1.2.14-1· amd64 · trixieAffected
nvd · alsa-lib · debian · 13
1.2.14-1· arm64 · trixieAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· amd64 · trixie-backportsAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· arm64 · trixie-backportsAffected
nvd · alsa-lib · debian · 13
- [libasound2-doc]Affected
Source package: [alsa-lib]
Details (4)
1.2.14-1· all · trixieAffected
nvd · alsa-lib · debian · 13
1.2.14-1· all · trixieAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· all · trixie-backportsAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· all · trixie-backportsAffected
nvd · alsa-lib · debian · 13
- [libasound2-plugin-smixer]Affected
Source package: [alsa-lib]
Details (4)
1.2.14-1· amd64 · trixieAffected
nvd · alsa-lib · debian · 13
1.2.14-1· arm64 · trixieAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· amd64 · trixie-backportsAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· arm64 · trixie-backportsAffected
nvd · alsa-lib · debian · 13
- [libasound2t64]Affected
Source package: [alsa-lib]
Details (4)
1.2.14-1· amd64 · trixieAffected
nvd · alsa-lib · debian · 13
1.2.14-1· arm64 · trixieAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· amd64 · trixie-backportsAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· arm64 · trixie-backportsAffected
nvd · alsa-lib · debian · 13
- [libatopology2t64]Affected
Source package: [alsa-lib]
Details (4)
1.2.14-1· amd64 · trixieAffected
nvd · alsa-lib · debian · 13
1.2.14-1· arm64 · trixieAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· amd64 · trixie-backportsAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· arm64 · trixie-backportsAffected
nvd · alsa-lib · debian · 13
- [libatopology-dev]Affected
Source package: [alsa-lib]
Details (4)
1.2.14-1· amd64 · trixieAffected
nvd · alsa-lib · debian · 13
1.2.14-1· arm64 · trixieAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· amd64 · trixie-backportsAffected
nvd · alsa-lib · debian · 13
1.2.16.1-1~bpo13+1· arm64 · trixie-backportsAffected
nvd · alsa-lib · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_21075-1.json]
- [https://github.com/alsa-project/alsa-lib/commit/536dd6f8affdf5197c12a63a71c92a70b2833cc0]
- [https://github.com/alsa-project/alsa-lib/releases/tag/v1.2.16.1]
- [https://lore.kernel.org/alsa-devel/CAGt8pqBU0p2voB+qHxWGcNJrKHAcBhAyHUUBPLBN-Yj_SiV6MQ@mail.gmail.com/]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-56109]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-56109]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22291-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22381-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22667-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:2885-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3270-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3492-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-56109]
- [https://osv.dev/vulnerability/USN-8538-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:21075-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-56109]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56109.json]
- [https://ubuntu.com/security/notices/USN-8538-1]
- [https://www.vulncheck.com/advisories/alsa-library-double-free-via-parse-def-in-conf-c]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]