{"id":"UBUNTU-CVE-2026-25068","details":"alsa-lib versions 1.2.2 up to and including 1.2.15.2, prior to commit 5f7fe33, contain a heap-based buffer overflow in the topology mixer control decoder. The tplg_decode_control_mixer1() function reads the num_channels field from untrusted .tplg data and uses it as a loop bound without validating it against the fixed-size channel array (SND_TPLG_MAX_CHAN). A crafted topology file with an excessive num_channels value can cause out-of-bounds heap writes, leading to a crash.","modified":"2026-06-09T17:14:26.933048150Z","published":"2026-01-29T20:16:00Z","related":["USN-8044-1","USN-8044-2"],"upstream":["CVE-2026-25068"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-25068"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-25068"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/alsa-lib-topology-decoder-heap-based-buffer-overflow"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8044-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8044-2"}],"affected":[{"package":{"name":"alsa-lib","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/alsa-lib?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.2-2.1ubuntu2.5+esm1"}]}],"versions":["1.1.9-0ubuntu1","1.2.1.2-2ubuntu2","1.2.2-2ubuntu1","1.2.2-2.1","1.2.2-2.1ubuntu1","1.2.2-2.1ubuntu2","1.2.2-2.1ubuntu2.1","1.2.2-2.1ubuntu2.2","1.2.2-2.1ubuntu2.3","1.2.2-2.1ubuntu2.4","1.2.2-2.1ubuntu2.5"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libasound2","binary_version":"1.2.2-2.1ubuntu2.5+esm1"},{"binary_name":"libasound2-data","binary_version":"1.2.2-2.1ubuntu2.5+esm1"},{"binary_name":"libasound2-plugin-smixer","binary_version":"1.2.2-2.1ubuntu2.5+esm1"},{"binary_name":"libatopology2","binary_version":"1.2.2-2.1ubuntu2.5+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25068.json"}},{"package":{"name":"alsa-lib","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/alsa-lib?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.6.1-1ubuntu1.1"}]}],"versions":["1.2.4-1.1ubuntu3","1.2.4-1.1ubuntu4","1.2.5.1-1ubuntu1","1.2.6.1-1ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libasound2","binary_version":"1.2.6.1-1ubuntu1.1"},{"binary_version":"1.2.6.1-1ubuntu1.1","binary_name":"libasound2-data"},{"binary_version":"1.2.6.1-1ubuntu1.1","binary_name":"libasound2-plugin-smixer"},{"binary_name":"libatopology2","binary_version":"1.2.6.1-1ubuntu1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25068.json"}},{"package":{"name":"alsa-lib","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/alsa-lib?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.11-1ubuntu0.2"}]}],"versions":["1.2.9-2","1.2.10-1","1.2.10-2","1.2.10-3","1.2.10-3build1","1.2.11-1build1","1.2.11-1build2","1.2.11-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.2.11-1ubuntu0.2","binary_name":"libasound2-data"},{"binary_version":"1.2.11-1ubuntu0.2","binary_name":"libasound2-plugin-smixer"},{"binary_version":"1.2.11-1ubuntu0.2","binary_name":"libasound2t64"},{"binary_version":"1.2.11-1ubuntu0.2","binary_name":"libatopology2t64"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25068.json"}},{"package":{"name":"alsa-lib","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/alsa-lib?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.14-1ubuntu1.1"}]}],"versions":["1.2.13-1build1","1.2.14-1","1.2.14-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"libasound2-data","binary_version":"1.2.14-1ubuntu1.1"},{"binary_version":"1.2.14-1ubuntu1.1","binary_name":"libasound2-plugin-smixer"},{"binary_version":"1.2.14-1ubuntu1.1","binary_name":"libasound2t64"},{"binary_version":"1.2.14-1ubuntu1.1","binary_name":"libatopology2t64"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25068.json"}},{"package":{"name":"alsa-lib","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/alsa-lib?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.15.3-1ubuntu1"}]}],"versions":["1.2.14-1ubuntu1","1.2.14-2ubuntu1","1.2.15-2","1.2.15.1-1","1.2.15.3-1","1.2.15.3-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libasound2-data","binary_version":"1.2.15.3-1ubuntu1"},{"binary_version":"1.2.15.3-1ubuntu1","binary_name":"libasound2-plugin-smixer"},{"binary_name":"libasound2t64","binary_version":"1.2.15.3-1ubuntu1"},{"binary_version":"1.2.15.3-1ubuntu1","binary_name":"libatopology2t64"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25068.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}