CVE-2026-90783 (GCVE-0-2026-90783)
Vulnerability from cvelistv5 – Published: 2026-09-13 12:22 – Updated: 2026-09-30 19:07
VLAI
EPSS
VEX
Title
MKVToolNix through 101.0 Heap Buffer Overflow via avilib ODML Superindex Integer Wraparound
Summary
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 17:32 UTC
CWE
- CWE-680 - Integer Overflow to Buffer Overflow
Assigner
VulnCheck
CNA
References
5 references
| URL | Tags |
|---|---|
| https://codeberg.org/mbunkus/mkvtoolnix/commit/14… | patch |
| https://codeberg.org/mbunkus/mkvtoolnix/src/tag/r… | technical-description |
| https://codeberg.org/mbunkus/mkvtoolnix | product |
| https://www.vulncheck.com/advisories/mkvtoolnix-t… | third-party-advisory |
| https://lists.debian.org/debian-lts-announce/2026… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Moritz Bunkus | MKVToolNix |
Affected:
0 , ≤ 101.0
(custom)
Unaffected: 1495126138e086080f0163bee27fafbdf956a1d0 (git) |
Date Public
2026-08-25 00:00
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