{"id":"UBUNTU-CVE-2026-56210","details":"A heap-buffer-overflow read vulnerability was found in libaom, the reference AV1 codec implementation. A missing bounds check in the SVC (Scalable Video Coding) layer ID control function allows setting a spatial_layer_id exceeding the configured number of layers. This causes an out-of-bounds heap read of approximately 40,728 bytes when computing a layer context array index. An attacker who can influence SVC encoder parameters in a network-facing service could exploit this for information disclosure (heap content leak) or denial of service (segmentation fault from hitting unmapped memory).","modified":"2026-09-16T20:24:08.760843500Z","published":"2026-06-19T17:16:00Z","related":["USN-8772-1"],"upstream":["CVE-2026-56210"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-56210"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-56210"},{"type":"REPORT","url":"https://aomedia.googlesource.com/aom/+/a93ba0ffaacd5f576a241bf739110e65287e516d"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2490801"},{"type":"REPORT","url":"https://issues.chromium.org/issues/503975732"},{"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":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"3.3.0-1ubuntu0.1+esm1","binary_name":"aom-tools"},{"binary_name":"libaom3","binary_version":"3.3.0-1ubuntu0.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56210.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":{"binaries":[{"binary_version":"3.8.2-2ubuntu0.2","binary_name":"aom-tools"},{"binary_name":"libaom3","binary_version":"3.8.2-2ubuntu0.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56210.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-2026-56210.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_version":"3.13.1-2ubuntu0.1","binary_name":"libaom3"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56210.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:N/A:H"},{"type":"Ubuntu","score":"medium"}]}