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DEBIAN-CVE-2026-90783

Type: advisorySource: OSV1 source record

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.

Announced Group revision 1
Original source ↗

DEBIAN-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: osv:DEBIAN-CVE-2026-90783

mkvtoolnix

Source reference: /affected/0/package/name

Affected versions
74.0.0-1

Source reference: /affected/0/versions

Fixed versions
74.0.0-1+deb12u1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

mkvtoolnix

Source reference: /affected/1/package/name

Affected versions
92.0-1

Source reference: /affected/1/versions

Fixed versions
92.0-1+deb13u1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

mkvtoolnix

Source reference: /affected/2/package/name

Affected versions
100.0-1

Source reference: /affected/2/versions

100.0-2

Source reference: /affected/2/versions

101.0-1

Source reference: /affected/2/versions

92.0-1

Source reference: /affected/2/versions

94.0-1

Source reference: /affected/2/versions

95.0-1

Source reference: /affected/2/versions

96.0-1

Source reference: /affected/2/versions

97.0-1

Source reference: /affected/2/versions

98.0-1

Source reference: /affected/2/versions

99.0-1

Source reference: /affected/2/versions

Fixed versions
101.0-2

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "74.0.0-1+deb12u1"
          }
        ]
      }
    ],
    "package": {
      "name": "mkvtoolnix",
      "purl": "pkg:deb/debian/mkvtoolnix?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "74.0.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90783.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "92.0-1+deb13u1"
          }
        ]
      }
    ],
    "package": {
      "name": "mkvtoolnix",
      "purl": "pkg:deb/debian/mkvtoolnix?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "92.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90783.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "101.0-2"
          }
        ]
      }
    ],
    "package": {
      "name": "mkvtoolnix",
      "purl": "pkg:deb/debian/mkvtoolnix?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "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"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90783.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#59416 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-90783 · Revision 1Source updated