Security advisory

{
  "id": "e522f10534cdf2a8d4d24ad83f0a7e23f19c8d93fe56750c20dcf2fccabf5a46",
  "url": "https://osv.dev/vulnerability/CVE-2018-12102",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-12102",
    "summary": "md4c 0.2.6 has a NULL pointer dereference in the function md_process_line in md4c.c, related to ctx->current_block.",
    "evidence": "osv:CVE-2018-12102",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-12102",
      "aliases": [
        "CVE-2018-12102"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mity/md4c",
              "type": "GIT",
              "events": [
                {
                  "introduced": "cb7ecd713593acef78f2698f6c5a5a59a2745b6f"
                },
                {
                  "last_affected": "cb7ecd713593acef78f2698f6c5a5a59a2745b6f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:md4c_project:md4c:0.2.6:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.2.6"
                      },
                      {
                        "last_affected": "0.2.6"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.2.6",
            "release-0.2.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12102.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:17.827875352Z",
      "provider": "osv",
      "references": [
        "https://github.com/Edward-L/fuzzing-pocs/tree/master/md4c",
        "https://github.com/mity/md4c/issues/41"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-12102",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381500,
  "published_at": "2018-06-11T13:29:00.217+00:00"
}