Security advisory

{
  "id": "1f93f581c47dc9fe181d1927cf4005e9231af5be646e1fb530ef57b015921db0",
  "url": "https://osv.dev/vulnerability/CVE-2021-40565",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-40565",
    "summary": "A Segmentation fault caused by a null pointer dereference vulnerability exists in Gpac through 1.0.1 via the gf_avc_parse_nalu function in av_parsers.c when using mp4box, which causes a denial of service.",
    "evidence": "osv:CVE-2021-40565",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-40565",
      "aliases": [
        "CVE-2021-40565"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/gpac/gpac",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "d8538e8ae946b32d99c6b2c57cbb327146e9cd9d"
                },
                {
                  "fixed": "893fb99b606eebfae46cde151846a980e689039b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gpac:gpac:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "893fb99b606eebfae46cde151846a980e689039b"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.0.1",
            "v0.7.1",
            "v0.7.0",
            "v0.6.0",
            "v0.5.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-40565.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-40565-23cf188a",
                "digest": {
                  "length": 4132,
                  "function_hash": "335139963073710083307518464564153621026"
                },
                "source": "https://github.com/gpac/gpac/commit/893fb99b606eebfae46cde151846a980e689039b",
                "target": {
                  "file": "src/media_tools/av_parsers.c",
                  "function": "gf_avc_parse_nalu"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-40565-5f5519ab",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "153580916275024851464425229044186991413",
                    "89277541988750827498244866193382836173",
                    "58821412537713668385346327648233806553",
                    "48322499738277173370318441782040572189"
                  ]
                },
                "source": "https://github.com/gpac/gpac/commit/893fb99b606eebfae46cde151846a980e689039b",
                "target": {
                  "file": "src/media_tools/av_parsers.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:08:47Z"
          }
        }
      ],
      "modified": "2026-10-20T14:08:47.974676973Z",
      "provider": "osv",
      "references": [
        "https://github.com/gpac/gpac/issues/1902",
        "https://www.debian.org/security/2023/dsa-5411",
        "https://github.com/gpac/gpac/commit/893fb99b606eebfae46cde151846a980e689039b"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-40565",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388575,
  "published_at": "2022-01-12T22:15:07.89+00:00"
}