Vulnerability-Lookup

ubuntu-cve-2026-90783

Vulnerability from osv_ubuntu

Published

2026-09-14 00:00

Modified

2026-09-14 00:00

Summary

Details

(MKVToolNix through 101.0 contains a heap buffer overflow in the bundle ...)

Severity

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-90783	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-90783	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mkvtoolnix",
            "binary_version": "8.8.0-1"
          },
          {
            "binary_name": "mkvtoolnix-gui",
            "binary_version": "8.8.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "mkvtoolnix",
        "purl": "pkg:deb/ubuntu/mkvtoolnix@8.8.0-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mkvtoolnix",
            "binary_version": "19.0.0-1"
          },
          {
            "binary_name": "mkvtoolnix-gui",
            "binary_version": "19.0.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "mkvtoolnix",
        "purl": "pkg:deb/ubuntu/mkvtoolnix@19.0.0-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "15.0.0-1",
        "15.0.0-1build1",
        "17.0.0-2",
        "18.0.0-1",
        "19.0.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mkvtoolnix",
            "binary_version": "45.0.0-2"
          },
          {
            "binary_name": "mkvtoolnix-gui",
            "binary_version": "45.0.0-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "mkvtoolnix",
        "purl": "pkg:deb/ubuntu/mkvtoolnix@45.0.0-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mkvtoolnix",
            "binary_version": "65.0.0-1"
          },
          {
            "binary_name": "mkvtoolnix-gui",
            "binary_version": "65.0.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "mkvtoolnix",
        "purl": "pkg:deb/ubuntu/mkvtoolnix@65.0.0-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "60.0.0-2",
        "62.0.0-1build1",
        "63.0.0-1",
        "64.0.0-1",
        "65.0.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mkvtoolnix",
            "binary_version": "82.0-1build2"
          },
          {
            "binary_name": "mkvtoolnix-gui",
            "binary_version": "82.0-1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "mkvtoolnix",
        "purl": "pkg:deb/ubuntu/mkvtoolnix@82.0-1build2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mkvtoolnix",
            "binary_version": "97.0-1build1"
          },
          {
            "binary_name": "mkvtoolnix-gui",
            "binary_version": "97.0-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "mkvtoolnix",
        "purl": "pkg:deb/ubuntu/mkvtoolnix@97.0-1build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "94.0-1",
        "95.0-1",
        "96.0-1",
        "97.0-1",
        "97.0-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "(MKVToolNix through 101.0 contains a heap buffer overflow in the bundle ...)",
  "id": "UBUNTU-CVE-2026-90783",
  "modified": "2026-09-14T00:00:00Z",
  "published": "2026-09-14T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-90783"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-90783"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-90783"
  ]
}

CVE-2026-90783 (GCVE-0-2026-90783)

Vulnerability from cvelistv5 – Published: 2026-09-13 12:22 – Updated: 2026-09-14 18:14

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

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

8.5 (High)


                        
                          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

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 mitre root

References

4 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

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

Credits

Tristan Madani

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-90783",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-14T17:32:46.690815Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-14T18:14:43.959Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "MKVToolNix",
          "repo": "https://codeberg.org/mbunkus/mkvtoolnix",
          "vendor": "Moritz Bunkus",
          "versions": [
            {
              "lessThanOrEqual": "101.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "1495126138e086080f0163bee27fafbdf956a1d0",
              "versionType": "git"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Tristan Madani"
        }
      ],
      "datePublic": "2026-08-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "MKVToolNix through 101.0 contains a heap buffer overflow in the bundled avilib library\u0027s 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        },
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-680",
              "description": "Integer Overflow to Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-13T12:22:02.443Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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      },
      "references": [
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          "name": "Patch Commit",
          "tags": [
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          ],
          "url": "https://codeberg.org/mbunkus/mkvtoolnix/commit/1495126138e086080f0163bee27fafbdf956a1d0"
        },
        {
          "name": "Unchecked video superindex allocation in avi_parse_input_file() at release-101.0",
          "tags": [
            "technical-description"
          ],
          "url": "https://codeberg.org/mbunkus/mkvtoolnix/src/tag/release-101.0/lib/avilib-0.6.10/avilib.c#L2552-L2570"
        },
        {
          "tags": [
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          "url": "https://codeberg.org/mbunkus/mkvtoolnix"
        },
        {
          "name": "VulnCheck Advisory: MKVToolNix through 101.0 Heap Buffer Overflow via avilib ODML Superindex Integer Wraparound",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/mkvtoolnix-through-101.0-heap-buffer-overflow-via-avilib-odml-superindex-integer-wraparound"
        }
      ],
      "title": "MKVToolNix through 101.0 Heap Buffer Overflow via avilib ODML Superindex Integer Wraparound",
      "x_generator": {
        "engine": "vulncheck-endgame"
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  },
  "cveMetadata": {
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-90783",
    "datePublished": "2026-09-13T12:22:02.443Z",
    "dateReserved": "2026-09-13T12:01:36.028Z",
    "dateUpdated": "2026-09-14T18:14:43.959Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.