UNKNOWN WRITE in fuzz_regexp

{
  "id": "83bc4eac290c23d90796a4e8f41568252d57b1c49eaf8c2f08304e5348b8ff1b",
  "url": "https://osv.dev/vulnerability/OSV-2025-1039",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UNKNOWN WRITE in fuzz_regexp",
    "summary": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=471926738 ``` Crash type: UNKNOWN WRITE Crash state: fuzz_regexp ```",
    "evidence": "osv:OSV-2025-1039",
    "products": [
      {
        "name": {
          "value": "quickjs",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "OSV-2025-1039",
      "aliases": [
        "OSV-2025-1039"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bellard/quickjs",
              "type": "GIT",
              "events": [
                {
                  "introduced": "31ef02b90785fbc6effb82c300bf05a2a0903088"
                }
              ]
            }
          ],
          "package": {
            "name": "quickjs",
            "purl": "pkg:generic/quickjs",
            "ecosystem": "OSS-Fuzz"
          },
          "database_specific": {
            "source": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/quickjs/OSV-2025-1039.yaml",
            "introduced_range": "c73a435f365e5250dd529cde00675528d7609edf:f1139494d18a2053630c5ed3384a42bb70db3c53"
          },
          "ecosystem_specific": {
            "severity": "HIGH"
          }
        }
      ],
      "modified": "2026-10-19T15:14:40.266519Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=471926738"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 375288,
  "published_at": "2025-12-29T00:18:31.417791+00:00"
}