{"id":"DEBIAN-CVE-2026-90783","details":"MKVToolNix through 101.0 contains a heap buffer overflow in the bundled avilib library's ODML superindex parser due to integer wraparound in 32-bit arithmetic. Attackers can craft a malicious AVI file with oversized entry counts that cause an undersized heap allocation, allowing a heap buffer overflow when the file is parsed with mkvmerge.","modified":"2026-10-01T08:47:31.067687477Z","published":"2026-09-13T13:16:29.560Z","upstream":["CVE-2026-90783"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-90783"}],"affected":[{"package":{"name":"mkvtoolnix","ecosystem":"Debian:12","purl":"pkg:deb/debian/mkvtoolnix?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"74.0.0-1+deb12u1"}]}],"versions":["74.0.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90783.json"}},{"package":{"name":"mkvtoolnix","ecosystem":"Debian:13","purl":"pkg:deb/debian/mkvtoolnix?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"92.0-1+deb13u1"}]}],"versions":["92.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90783.json"}},{"package":{"name":"mkvtoolnix","ecosystem":"Debian:14","purl":"pkg:deb/debian/mkvtoolnix?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"101.0-2"}]}],"versions":["100.0-1","100.0-2","101.0-1","92.0-1","94.0-1","95.0-1","96.0-1","97.0-1","98.0-1","99.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90783.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/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"}]}