Security advisory

{
  "id": "a91d648440ea3cb95aebb0cba495259399acf2f8b8fd2054bf88a57659260b8a",
  "url": "https://osv.dev/vulnerability/CVE-2021-4216",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-4216",
    "summary": "A Floating point exception (division-by-zero) flaw was found in Mupdf for zero width pages in muraster.c. It is fixed in Mupdf-1.20.0-rc1 upstream.",
    "evidence": "osv:CVE-2021-4216",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-4216",
      "aliases": [
        "CVE-2021-4216"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/artifexsoftware/mupdf",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a5de2ca97a8bb3255f72b0f79a4a1d89688bb0ff"
                },
                {
                  "fixed": "22c47acbd52949421f8c7cb46ea1556827d0fcbf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:artifex:mupdf:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.20.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "22c47acbd52949421f8c7cb46ea1556827d0fcbf"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.19.0-rc1-so-3.12.7",
            "1.19.0-rc1",
            "1.18.1-so-3.12.6",
            "1.18.1-so-3.12.4",
            "1.18.1-so-3.12.2b1-android",
            "1.18.1-so-3.12.2b1-ios",
            "1.18.1-so-3.12.1-android",
            "1.18.1-so-3.12.1-ios",
            "1.18.0",
            "1.18.0-rc1",
            "1.17.0-rc1",
            "1.16.1",
            "1.16.1-epub-prerelease",
            "1.16.0-rc2",
            "1.16.0",
            "1.16.0-rc1",
            "1.15.0-rc1",
            "1.15.0",
            "1.14.0",
            "1.14.0-rc1",
            "1.13.0-rc1",
            "1.13.0",
            "1.12.0",
            "1.11.1",
            "1.11",
            "1.11-rc1",
            "1.10",
            "1.10-rc2",
            "1.10-rc1",
            "1.9a",
            "1.9",
            "1.9-rc2",
            "1.9-rc1",
            "1.8",
            "1.7a",
            "1.7",
            "1.7-rc1",
            "1.6-appstore",
            "1.6-ios-rc2",
            "1.6-ios-rc1",
            "android-release-60",
            "1.6",
            "1.5-ios-rc8",
            "1.5-ios-appstore",
            "1.5-ios-rc7",
            "1.5-ios-rc6",
            "1.5-ios",
            "1.5",
            "1.4-ios",
            "1.4",
            "1.3rc1",
            "1.2",
            "1.1-forms-tech-preview",
            "1.0",
            "1.0rc1",
            "0.9",
            "0.8",
            "0.7",
            "0.6",
            "0.5",
            "0.4",
            "0.3",
            "0.2",
            "0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4216.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-4216-3487da7d",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "148428731875479396939769254416903401659",
                    "334154895119732715934329687386372964908",
                    "271578754670549623668636309170831988566",
                    "183537282055440426407130261521748130023",
                    "21263257204605018599019492831581804131"
                  ]
                },
                "source": "https://github.com/artifexsoftware/mupdf/commit/22c47acbd52949421f8c7cb46ea1556827d0fcbf",
                "target": {
                  "file": "source/tools/muraster.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-4216-53f23848",
                "digest": {
                  "length": 1679,
                  "function_hash": "21006412885745212366555215011289400705"
                },
                "source": "https://github.com/artifexsoftware/mupdf/commit/22c47acbd52949421f8c7cb46ea1556827d0fcbf",
                "target": {
                  "file": "source/tools/muraster.c",
                  "function": "initialise_banding"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:08:53Z"
          }
        }
      ],
      "modified": "2026-10-20T14:08:53.111171060Z",
      "provider": "osv",
      "references": [
        "https://bugs.ghostscript.com/show_bug.cgi?id=704834",
        "https://github.com/ArtifexSoftware/mupdf/commit/22c47acbd52949421f8c7cb46ea1556827d0fcbf"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-4216",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388592,
  "published_at": "2022-08-26T16:15:09.82+00:00"
}