Security advisory

{
  "id": "bfc189cc3c44e440e3301146e5231df7075a902f4491f291a322e9144ed27d9f",
  "url": "https://osv.dev/vulnerability/CVE-2026-12245",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-12245",
    "summary": "NSD from version 4.13.0 has a heap use-after-free bug in logging errors on TLS connections, causing a crash of the server process, which can be triggered trivially by sending a DNS query over a DoT connection, and closing the connection without reading the response.",
    "evidence": "osv:CVE-2026-12245",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-12245",
      "aliases": [
        "CVE-2026-12245"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nlnetlabs/nsd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "559013e8371cb645cd4150d41401823ad3789124"
                },
                {
                  "fixed": "fc930b88cb4f628defae9835449065945bda7ddc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nlnetlabs:nsd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.13.0"
                      },
                      {
                        "fixed": "4.14.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "NSD_4_14_2_REL",
            "NSD_4_14_2_RC1",
            "NSD_4_14_1_REL",
            "NSD_4_14_1_RC1",
            "list",
            "NSD_4_14_0_RC1",
            "NSD_4_13_0_REL"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12245.json"
          }
        }
      ],
      "modified": "2026-10-27T02:30:46.383702048Z",
      "provider": "osv",
      "references": [
        "https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12245.txt"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-12245",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 460052,
  "published_at": "2026-06-25T07:16:45.08+00:00"
}