{"id":"UBUNTU-CVE-2026-56208","details":"A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a denial of service (process crash) or potentially achieve code execution.","modified":"2026-09-16T20:24:06.316024984Z","published":"2026-06-19T17:16:00Z","related":["USN-8772-1"],"upstream":["CVE-2026-56208"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-56208"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-56208"},{"type":"REPORT","url":"https://aomedia.googlesource.com/aom/+/243f8ae84bfbc495b3a3c12948abc4dff3af2f84"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2490799"},{"type":"REPORT","url":"https://issues.chromium.org/issues/504317456"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8772-1"}],"affected":[{"package":{"name":"aom","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/aom?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.0-1ubuntu0.1+esm1"}]}],"versions":["1.0.0.errata1-3build1","3.2.0-2","3.3.0-1","3.3.0-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"aom-tools","binary_version":"3.3.0-1ubuntu0.1+esm1"},{"binary_name":"libaom3","binary_version":"3.3.0-1ubuntu0.1+esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56208.json"}},{"package":{"name":"aom","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/aom?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.2-2ubuntu0.2"}]}],"versions":["3.6.1-1","3.7.0-1","3.7.1-1","3.8.1-1","3.8.2-2build1","3.8.2-2ubuntu0.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"aom-tools","binary_version":"3.8.2-2ubuntu0.2"},{"binary_name":"libaom3","binary_version":"3.8.2-2ubuntu0.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56208.json"}},{"package":{"name":"aom","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/aom?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.12.0-1","3.12.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"aom-tools","binary_version":"3.12.1-1"},{"binary_name":"libaom3","binary_version":"3.12.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56208.json"}},{"package":{"name":"aom","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/aom?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.13.1-2ubuntu0.1"}]}],"versions":["3.12.1-1","3.13.1-2"],"ecosystem_specific":{"binaries":[{"binary_name":"aom-tools","binary_version":"3.13.1-2ubuntu0.1"},{"binary_name":"libaom3","binary_version":"3.13.1-2ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56208.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H"},{"type":"Ubuntu","score":"medium"}]}