{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:4.2:-:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "4.2-NA"
              },
              {
                "last_affected": "4.2-NA"
              }
            ],
            "source": "CPE_STRING"
          },
          "events": [
            {
              "introduced": "517573a67088b5c7a25c18373434e3448892ee93"
            },
            {
              "last_affected": "517573a67088b5c7a25c18373434e3448892ee93"
            }
          ],
          "repo": "https://git.ffmpeg.org/ffmpeg.git",
          "type": "GIT"
        }
      ],
      "versions": [
        "4.2-NA"
      ]
    },
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:4.2:-:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "4.2-NA"
              },
              {
                "last_affected": "4.2-NA"
              }
            ],
            "source": "CPE_STRING"
          },
          "events": [
            {
              "introduced": "517573a67088b5c7a25c18373434e3448892ee93"
            },
            {
              "last_affected": "517573a67088b5c7a25c18373434e3448892ee93"
            }
          ],
          "repo": "https://github.com/ffmpeg/ffmpeg",
          "type": "GIT"
        }
      ],
      "versions": [
        "4.2-NA"
      ]
    }
  ],
  "database_specific": {
    "unresolved_ranges": [
      {
        "cpes": [
          "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
          "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "9.0"
          },
          {
            "last_affected": "9.0"
          },
          {
            "introduced": "10.0"
          },
          {
            "last_affected": "10.0"
          }
        ],
        "source": "CPE_STRING",
        "vendor_product": "debian:debian_linux"
      }
    ]
  },
  "details": "Buffer Overflow vulnerability in FFmpeg 4.2 in the build_diff_map function in libavfilter/vf_fieldmatch.c, which could let a remote malicious user cause a Denial of Service.",
  "id": "CVE-2020-22020",
  "modified": "2026-08-17T03:36:08.541771529Z",
  "published": "2021-05-26T20:15:08.207Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=ce5274c1385d55892a692998923802023526b765"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.debian.org/debian-lts-announce/2021/08/msg00018.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.debian.org/security/2021/dsa-4990"
    },
    {
      "type": "REPORT",
      "url": "https://trac.ffmpeg.org/ticket/8239"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}