{"id":"UBUNTU-CVE-2026-5673","details":"A flaw was found in libtheora. This heap-based out-of-bounds read vulnerability exists within the AVI (Audio Video Interleave) parser, specifically in the avi_parse_input_file() function. A local attacker could exploit this by tricking a user into opening a specially crafted AVI file containing a truncated header sub-chunk. This could lead to a denial-of-service (application crash) or potentially leak sensitive information from the heap.","modified":"2026-05-20T16:26:24.923848536Z","published":"2026-04-06T10:16:00Z","upstream":["CVE-2026-5673"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-5673"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-5673"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-5673"}],"affected":[{"package":{"name":"asc","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/asc?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.0.0-1build1","2.6.1.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.6.1.0-1","binary_name":"asc"},{"binary_name":"asc-data","binary_version":"2.6.1.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5673.json"}},{"package":{"name":"mkvtoolnix","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mkvtoolnix?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.2.0-2","8.5.1-1","8.5.2-1","8.6.0-1","8.6.1-1","8.7.0-1","8.8.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"mkvtoolnix","binary_version":"8.8.0-1"},{"binary_name":"mkvtoolnix-gui","binary_version":"8.8.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5673.json"}},{"package":{"name":"ogmrip","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ogmrip?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-0ubuntu1","1.0.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libogmrip1","binary_version":"1.0.1-1"},{"binary_version":"1.0.1-1","binary_name":"ogmrip"},{"binary_name":"ogmrip-plugins","binary_version":"1.0.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5673.json"}},{"package":{"name":"asc","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/asc?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.1.0-2","2.6.1.0-2build1","2.6.1.0-3"],"ecosystem_specific":{"binaries":[{"binary_name":"asc","binary_version":"2.6.1.0-3"},{"binary_name":"asc-data","binary_version":"2.6.1.0-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5673.json"}},{"package":{"name":"mkvtoolnix","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mkvtoolnix?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["15.0.0-1","15.0.0-1build1","17.0.0-2","18.0.0-1","19.0.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"mkvtoolnix","binary_version":"19.0.0-1"},{"binary_name":"mkvtoolnix-gui","binary_version":"19.0.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5673.json"}},{"package":{"name":"ogmrip","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ogmrip?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.1-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"libogmrip1","binary_version":"1.0.1-1build2"},{"binary_name":"ogmrip","binary_version":"1.0.1-1build2"},{"binary_name":"ogmrip-plugins","binary_version":"1.0.1-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5673.json"}},{"package":{"name":"asc","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/asc?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.1.0-5build1","2.6.1.0-6","2.6.1.0-6build1","2.6.1.0-6build2","2.6.1.0-6build3","2.6.1.0-6build4"],"ecosystem_specific":{"binaries":[{"binary_name":"asc","binary_version":"2.6.1.0-6build4"},{"binary_name":"asc-data","binary_version":"2.6.1.0-6build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5673.json"}},{"package":{"name":"mkvtoolnix","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mkvtoolnix?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["37.0.0-1build1","38.0.0-1","39.0.0-1","40.0.0-1","40.0.0-3","41.0.0-1","42.0.0-1","43.0.0-1","43.0.0-1ubuntu1","43.0.0-1ubuntu2","44.0.0-1ubuntu1","45.0.0-1ubuntu1","45.0.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"45.0.0-2","binary_name":"mkvtoolnix"},{"binary_version":"45.0.0-2","binary_name":"mkvtoolnix-gui"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5673.json"}},{"package":{"name":"ogmrip","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ogmrip?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"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