Heap buffer overflow in finfo_buffer

{
  "id": "52df9f600fb583b231d1176e37cca37bdb0ea689a80e1ac510e3562fa028ef87",
  "url": "https://osv.dev/vulnerability/CVE-2022-31627",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Heap buffer overflow in finfo_buffer",
    "summary": "In PHP versions 8.1.x below 8.1.8, when fileinfo functions, such as finfo_buffer, due to incorrect patch applied to the third party code from libmagic, incorrect function may be used to free allocated memory, which may lead to heap corruption.",
    "evidence": "osv:CVE-2022-31627",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-31627",
      "aliases": [
        "BIT-libphp-2022-31627",
        "BIT-php-2022-31627",
        "BIT-php-min-2022-31627",
        "CVE-2022-31627"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/php/php-src",
              "type": "GIT",
              "events": [
                {
                  "introduced": "381ba9f5d0edd0c9c8ec1dea7e21d513ad08b115"
                },
                {
                  "fixed": "8d84e44e7bef81b5b5d896ba1459304e94ec9b10"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.1.0"
                      },
                      {
                        "fixed": "8.1.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-31627.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.103956264Z",
      "provider": "osv",
      "references": [
        "https://bugs.php.net/bug.php?id=81723",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/31xxx/CVE-2022-31627.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-31627",
        "https://security.gentoo.org/glsa/202209-20",
        "https://security.netapp.com/advisory/ntap-20220826-0008/"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-590"
        ],
        "cna_assigner": "php",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.1.X"
                  },
                  {
                    "fixed": "8.1.8"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/31xxx/CVE-2022-31627.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-31627",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492666,
  "published_at": "2022-07-28T05:50:09.522+00:00"
}