{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.27.0"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "aca07679a6dd281ee6411f5e7de2ed0ee796bee8"
            }
          ],
          "repo": "https://github.com/opensc/opensc",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-m58q-rmjm-mmfx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66037.json"
  },
  "details": "OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, feeding a crafted input to the fuzz_pkcs15_reader harness causes OpenSC to perform an out-of-bounds heap read in the X.509/SPKI handling path. Specifically, sc_pkcs15_pubkey_from_spki_fields() allocates a zero-length buffer and then reads one byte past the end of that allocation. This issue has been patched in version 0.27.0.",
  "id": "CVE-2025-66037",
  "modified": "2026-04-01T23:08:12.786686058Z",
  "published": "2026-03-30T17:01:27.790Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66037.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/OpenSC/OpenSC/security/advisories/GHSA-m58q-rmjm-mmfx"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66037"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-66037"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenSC: Out of Bounds vulnerability"
}