Security advisory

{
  "id": "e7fe92e2e6475eec4281f192763c91326929d37d6da57c7652849063ffcbec4f",
  "url": "https://osv.dev/vulnerability/CVE-2021-31256",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-31256",
    "summary": "Memory leak in the stbl_GetSampleInfos function in MP4Box in GPAC 1.0.1 allows attackers to read memory via a crafted file.",
    "evidence": "osv:CVE-2021-31256",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-31256",
      "aliases": [
        "CVE-2021-31256"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/gpac/gpac",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d8538e8ae946b32d99c6b2c57cbb327146e9cd9d"
                },
                {
                  "last_affected": "d8538e8ae946b32d99c6b2c57cbb327146e9cd9d"
                },
                {
                  "fixed": "2da2f68bffd51d89b1d272d22aa8cc023c1c066e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gpac:gpac:1.0.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.0.1"
                      },
                      {
                        "last_affected": "1.0.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2da2f68bffd51d89b1d272d22aa8cc023c1c066e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.0.1",
            "v1.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-31256.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-31256-05ee90d3",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "271379964838622770638191838537824836551",
                    "74850478146093276797840713117210784655",
                    "21002431492837768195116458944965376348",
                    "10439252769331870000504154050764030868",
                    "270499913990714120200417959583955387157",
                    "71653203197305157759355907345428642969",
                    "192356018987768621237434183887153868824",
                    "30849309437551593067950658740262982675"
                  ]
                },
                "source": "https://github.com/gpac/gpac/commit/2da2f68bffd51d89b1d272d22aa8cc023c1c066e",
                "target": {
                  "file": "src/isomedia/stbl_read.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-31256-83bd733c",
                "digest": {
                  "length": 4707,
                  "function_hash": "178363004142591669781357107860031073898"
                },
                "source": "https://github.com/gpac/gpac/commit/2da2f68bffd51d89b1d272d22aa8cc023c1c066e",
                "target": {
                  "file": "src/isomedia/stbl_read.c",
                  "function": "stbl_GetSampleInfos"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:22:34Z"
          }
        }
      ],
      "modified": "2026-10-20T14:22:34.899284692Z",
      "provider": "osv",
      "references": [
        "https://github.com/gpac/gpac/commit/2da2f68bffd51d89b1d272d22aa8cc023c1c066e",
        "https://github.com/gpac/gpac/issues/1705"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-31256",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388843,
  "published_at": "2021-04-19T19:15:18.203+00:00"
}