UNKNOWN READ in Assimp::SceneCombiner::CopyScene

{
  "id": "257442c29ba5e81e34d50823819a56121d8d4b8516da627ce5310531272ec8df",
  "url": "https://osv.dev/vulnerability/OSV-2025-54",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UNKNOWN READ in Assimp::SceneCombiner::CopyScene",
    "summary": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=390864967 ``` Crash type: UNKNOWN READ Crash state: Assimp::SceneCombiner::CopyScene Assimp::Exporter::Export Assimp::Exporter::ExportToBlob ```",
    "evidence": "osv:OSV-2025-54",
    "products": [
      {
        "name": {
          "value": "assimp",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "v5.3.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v5.3.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v5.4.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v5.4.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v5.4.2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v5.4.3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "master",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "OSV-2025-54",
      "aliases": [
        "OSV-2025-54"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/assimp/assimp.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9d6b32f5c5118e67e99d4be3087f49ad0b7660de"
                },
                {
                  "fixed": "bcf11c252a9635af83c0f48b5ebdfad8e1ab5522"
                },
                {
                  "fixed": "ab66a1674fcfac87aaba4c8b900b315ebc3e7dbd"
                }
              ]
            }
          ],
          "package": {
            "name": "assimp",
            "purl": "pkg:generic/assimp",
            "ecosystem": "OSS-Fuzz"
          },
          "versions": [
            "v5.3.0",
            "v5.3.1",
            "v5.4.0",
            "v5.4.1",
            "v5.4.2",
            "v5.4.3",
            "master"
          ],
          "database_specific": {
            "source": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/assimp/OSV-2025-54.yaml",
            "fixed_range": "f398a701634dccbd555d851598f26191605e2e59:bcf11c252a9635af83c0f48b5ebdfad8e1ab5522",
            "introduced_range": "41102eeda6aa1461a5f4a52a743b2a4133732f9c:0c4d5909f8ca1931f3ca5c66ab5f0c37ea2efc2e"
          },
          "ecosystem_specific": {
            "severity": "MEDIUM"
          }
        }
      ],
      "modified": "2026-10-20T17:23:07.162907702Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=390864967"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 389783,
  "published_at": "2025-01-22T00:15:23.827419+00:00"
}