MKVToolNix through 101.0 Heap Buffer Overflow via avilib ODML Superindex Integer Wraparound
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.
CVE-2026-90783
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90783
MKVToolNix
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://codeberg.org/mbunkus/mkvtoolnix",
"vendor": "Moritz Bunkus",
"product": "MKVToolNix",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "custom",
"lessThanOrEqual": "101.0"
},
{
"status": "unaffected",
"version": "1495126138e086080f0163bee27fafbdf956a1d0",
"versionType": "git"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-90783
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #4828 · Revision 1
- Added to Heist Feed
- Publisher date