{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "7.0"
              },
              {
                "last_affected": "8.1.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "083443d67cb159ce469e5d902346b8d0c2cd1c93"
            },
            {
              "last_affected": "38b88335f99e76ed89ff3c93f877fdefce736c13"
            }
          ],
          "repo": "https://github.com/ffmpeg/ffmpeg",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66041.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "7.0"
          },
          {
            "last_affected": "8.1.2"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "7.0"
          },
          {
            "last_affected": "8.1.2"
          }
        ],
        "source": "CPE_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "7.0"
          },
          {
            "fixed": "8.1.2"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "FFmpeg 7.0 through 8.1.2, fixed in commit 4da9812, contains a heap out-of-bounds write vulnerability in the vf_quirc filter that allows an attacker to corrupt heap memory by supplying a crafted PGS/SUP subtitle file with mismatched frame dimensions. Attackers can provide a subtitle file whose second presentation has larger dimensions than its first, causing av_image_copy_plane() to copy data exceeding the initial allocation size into the undersized libquirc grayscale image buffer, resulting in heap corruption and process crash with potential for code execution.",
  "id": "CVE-2026-66041",
  "modified": "2026-08-10T03:46:47.659445116Z",
  "published": "2026-07-24T19:54:11.426Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://code.ffmpeg.org/FFmpeg/FFmpeg"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66041.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66041"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/ffmpeg-heap-out-of-bounds-write-via-vf-quirc-filter"
    },
    {
      "type": "REPORT",
      "url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23625"
    },
    {
      "type": "FIX",
      "url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/4da9812e25894fb51d62a8875cfa8eb39b5e20f5"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "FFmpeg 7.0 - 8.1.2 Heap Out-of-Bounds Write via vf_quirc Filter"
}