{"id":"CVE-2026-90783","aliases":["ALPINE-CVE-2026-90783","DEBIAN-CVE-2026-90783","EUVD-2026-77010","GHSA-x9xf-h66v-mjmc","UBUNTU-CVE-2026-90783","openSUSE-SU-2026:11779-1","openSUSE-SU-2026:21867-1"],"status":"published","title":"MKVToolNix through 101.0 Heap Buffer Overflow via avilib ODML Superindex Integer Wraparound","description":"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.","severity":{"version":"4.0","score":8.5,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00202,"percentile":0.10172,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-680"],"published":"2026-09-13T12:22:02Z","modified":"2026-11-03T06:33:04Z","fixes":[{"ecosystem":"Alpine:v3.24","package":"mkvtoolnix","fixed_in":["99.0-r1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"mkvtoolnix","fixed_in":["74.0.0-1+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"mkvtoolnix","fixed_in":["92.0-1+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"mkvtoolnix","fixed_in":["101.0-2"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"mkvtoolnix","fixed_in":["101.0-2.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 16.0","package":"mkvtoolnix","fixed_in":["95.0-bp160.2.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.24","package":"mkvtoolnix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"99.0-r1"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"mkvtoolnix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"74.0.0-1+deb12u1"}]}],"versions":["74.0.0-1"]},{"source":"osv","ecosystem":"Debian:13","package":"mkvtoolnix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"92.0-1+deb13u1"}]}],"versions":["92.0-1"]},{"source":"osv","ecosystem":"Debian:14","package":"mkvtoolnix","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"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"mkvtoolnix","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"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"mkvtoolnix","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"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"mkvtoolnix","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"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"mkvtoolnix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["60.0.0-2","62.0.0-1build1","63.0.0-1","64.0.0-1","65.0.0-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"mkvtoolnix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["78.0-2","79.0-1","80.0-1","81.0-1","81.0-1build1","82.0-1","82.0-1build1","82.0-1build2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"mkvtoolnix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["97.0-1build1","98.0-1","99.0-1","100.0-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"mkvtoolnix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["94.0-1","95.0-1","96.0-1","97.0-1","97.0-1build1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"mkvtoolnix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"101.0-2.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap 16.0","package":"mkvtoolnix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"95.0-bp160.2.1"}]}]}],"products":[{"vendor":"moritz bunkus","product":"mkvtoolnix"}],"references":[{"url":"https://codeberg.org/mbunkus/mkvtoolnix/commit/1495126138e086080f0163bee27fafbdf956a1d0","tags":["patch"]},{"url":"https://codeberg.org/mbunkus/mkvtoolnix/src/tag/release-101.0/lib/avilib-0.6.10/avilib.c#L2552-L2570","tags":["technical-description"]},{"url":"https://codeberg.org/mbunkus/mkvtoolnix","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/mkvtoolnix-through-101.0-heap-buffer-overflow-via-avilib-odml-superindex-integer-wraparound","tags":["third-party-advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2026/09/msg00040.html"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90783"},{"url":"https://github.com/advisories/GHSA-x9xf-h66v-mjmc"},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-90783","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-90783","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-90783","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90783","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-90783","tags":["web"]},{"url":"https://bugzilla.suse.com/1280126","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-90783","title":"MKVToolNix through 101.0 Heap Buffer Overflow via avilib ODML Superindex Integer Wraparound","description":"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.","status":"published","published":"2026-09-13T12:22:02.443Z","modified":"2026-09-30T19:07:45.268Z","cvss":[{"version":"4.0","score":8.5,"vector":"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","level":"high","assessor":"cna"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-680"],"updated_at":"2026-11-02T13:45:36.695039Z"}],"euvd":[{"id":"EUVD-2026-77010","description":"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.","status":"published","published":"2026-09-13T12:22:02Z","modified":"2026-09-30T19:07:45Z","cvss":[{"version":"4.0","score":8.5,"vector":"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","level":"high"}],"updated_at":"2026-11-02T17:27:47.733217Z"}],"ghsa":[{"id":"GHSA-x9xf-h66v-mjmc","title":"MKVToolNix through 101.0 contains a heap buffer overflow in the bundled avilib library's ODML...","description":"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.","status":"published","published":"2026-09-13T15:30:22Z","modified":"2026-09-30T21:31:51Z","cvss":[{"version":"4.0","score":8.5,"vector":"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","level":"high"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-680"],"updated_at":"2026-11-02T15:12:38.770231Z"}],"nvd":[{"id":"CVE-2026-90783","description":"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.","status":"published","published":"2026-09-13T13:16:29.56Z","modified":"2026-09-30T20:17:36.107Z","cvss":[{"version":"4.0","score":8.5,"vector":"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","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-680"],"updated_at":"2026-11-02T14:12:46.980627Z"}],"osv":[{"id":"ALPINE-CVE-2026-90783","description":"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.","status":"published","published":"2026-09-13T13:16:29.56Z","modified":"2026-11-03T06:33:04.409453968Z","cvss":[{"version":"4.0","score":8.5,"vector":"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","level":"high"}],"updated_at":"2026-11-03T07:15:37.282377Z"},{"id":"DEBIAN-CVE-2026-90783","description":"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.","status":"published","published":"2026-09-13T13:16:29.56Z","modified":"2026-10-01T08:47:31.067687477Z","cvss":[{"version":"4.0","score":8.5,"vector":"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","level":"high"}],"updated_at":"2026-11-02T15:46:06.410207Z"},{"id":"UBUNTU-CVE-2026-90783","description":"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.","status":"published","published":"2026-09-13T13:16:00Z","modified":"2026-10-17T13:01:16.726839117Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"},{"version":"4.0","score":8.5,"vector":"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","level":"high"}],"updated_at":"2026-11-02T16:57:40.980117Z"},{"id":"openSUSE-SU-2026:11779-1","title":"mkvtoolnix-101.0-2.1 on GA media","description":"These are all security issues fixed in the mkvtoolnix-101.0-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-09-14T00:00:00Z","modified":"2026-09-15T10:15:04.080701738Z","updated_at":"2026-11-02T16:58:39.516824Z"},{"id":"openSUSE-SU-2026:21867-1","title":"Security update for mkvtoolnix","description":"This update for mkvtoolnix fixes the following issues:\n\nChanges in mkvtoolnix:\n\n- CVE-2026-90783: heap buffer overflow in the bundled avilib library's ODML superindex parser due to integer wraparound in 32-bit arithmetic (boo#1280126).\n","status":"published","published":"2026-09-16T16:27:55Z","modified":"2026-09-17T18:23:14.643462592Z","updated_at":"2026-11-02T16:58:42.426393Z"}]}}