Security advisory

{
  "id": "9278a075d96916cc844f863267d8c4e239009a64035812379671520b10625b1b",
  "url": "https://osv.dev/vulnerability/CVE-2018-12459",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-12459",
    "summary": "An inconsistent bits-per-sample value in the ff_mpeg4_decode_picture_header function in libavcodec/mpeg4videodec.c in FFmpeg 4.0 may trigger an assertion violation while converting a crafted AVI file to MPEG4, leading to a denial of service.",
    "evidence": "osv:CVE-2018-12459",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-12459",
      "aliases": [
        "CVE-2018-12459"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.ffmpeg.org/ffmpeg.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ace829cb45cff530b8a0aed6adf18f329d7a98f6"
                },
                {
                  "last_affected": "ace829cb45cff530b8a0aed6adf18f329d7a98f6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:4.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0"
                      },
                      {
                        "last_affected": "4.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.0",
            "n4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12459.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://github.com/ffmpeg/ffmpeg",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ace829cb45cff530b8a0aed6adf18f329d7a98f6"
                },
                {
                  "last_affected": "ace829cb45cff530b8a0aed6adf18f329d7a98f6"
                },
                {
                  "fixed": "2fc108f60f98cd00813418a8754a46476b404a3c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:4.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0"
                      },
                      {
                        "last_affected": "4.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2fc108f60f98cd00813418a8754a46476b404a3c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.0",
            "n4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12459.json",
            "vanir_signatures": [
              {
                "id": "CVE-2018-12459-57d6d724",
                "digest": {
                  "length": 4722,
                  "function_hash": "293953060746545110115995344497464201232"
                },
                "source": "https://github.com/ffmpeg/ffmpeg/commit/2fc108f60f98cd00813418a8754a46476b404a3c",
                "target": {
                  "file": "libavcodec/mpeg4videodec.c",
                  "function": "ff_mpeg4_decode_picture_header"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2018-12459-bd8e4d38",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "276984771347048471388697408929656823427",
                    "40868172712932210822047402219494391158",
                    "108981795129314371954512303332135972338"
                  ]
                },
                "source": "https://github.com/ffmpeg/ffmpeg/commit/2fc108f60f98cd00813418a8754a46476b404a3c",
                "target": {
                  "file": "libavcodec/mpeg4videodec.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-24T14:11:00Z"
          }
        }
      ],
      "modified": "2026-10-24T14:11:00.373740403Z",
      "provider": "osv",
      "references": [
        "https://github.com/FFmpeg/FFmpeg/commit/2fc108f60f98cd00813418a8754a46476b404a3c"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-12459",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 443205,
  "published_at": "2018-06-15T15:29:00.28+00:00"
}