Heap-buffer-overflow write in FFmpeg SANM decoding due to lack of bounds-checking in old_codec48

{
  "id": "87adac6d89a2eab063b6f024cf28f51134ff2faef55b5758ae93542cbbd62046",
  "url": "https://osv.dev/vulnerability/CVE-2025-59730",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Heap-buffer-overflow write in FFmpeg SANM decoding due to lack of bounds-checking in old_codec48",
    "summary": "When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it. Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution. This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow. process_frame_obj initializes the buffers based on the frame resolution: We recommend upgrading to version 8.0 or beyond.",
    "evidence": "osv:CVE-2025-59730",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-59730",
      "aliases": [
        "CVE-2025-59730"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.ffmpeg.org/ffmpeg.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "140fd653aed8cad774f991ba083e2d01e86420c7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "829680f96a7a7ff02d1543895ec0fb713309d5c0"
                      },
                      {
                        "fixed": "8.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "n7.2-dev",
            "n7.1-dev",
            "n6.2-dev",
            "n6.1-dev",
            "n5.2-dev",
            "n5.1-dev",
            "n4.5-dev",
            "n4.4-dev",
            "n4.3-dev",
            "n4.2-dev",
            "n4.1-dev",
            "n3.5-dev",
            "n3.4-dev",
            "n3.3-dev",
            "n3.2-dev",
            "n3.1-dev",
            "n2.9-dev",
            "n2.8-dev",
            "n2.7-dev",
            "n2.6-dev",
            "n2.5-dev",
            "n2.4-dev",
            "n2.3-dev",
            "n2.2-dev",
            "n2.0",
            "n2.1-dev",
            "n1.3-dev",
            "n1.2-dev",
            "n1.1-dev",
            "n0.12-dev",
            "n0.11-dev",
            "n0.8",
            "N"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-59730.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.603281894Z",
      "provider": "osv",
      "references": [
        "https://issuetracker.google.com/434637586",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59730.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-59730",
        "https://git.ffmpeg.org/ffmpeg.git"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-787"
        ],
        "cna_assigner": "Google",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59730.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-59730",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506259,
  "published_at": "2025-10-06T08:09:11.029+00:00"
}