HIGHCVSS 7.8Vulnerability
CVE-2026-90783
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.
Properties
- severity
- HIGH
- cvss_severity
- HIGH
- cvss_score
- 7.8
- retrieved_at
- 2026-09-25T21:30:45+00:00
- score
- 7.8
- last_source
- NVD
- cve_id
- CVE-2026-90783
- cvss_vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- signal_observed_at
- 2026-09-25T21:30:45+00:00
- vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- published_at
- 2026-09-13T13:16:29.560
- last_modified
- 2026-09-24T20:43:32.537
Related Entities (2)
HAS_WEAKNESS (1)
→[Weakness]Integer Overflow to Buffer Overflow
DESCRIBED_BY (1)
→[Source]NVD
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