Security advisory

{
  "id": "5f0e79bbfbd672b2bc8d7ac8a42f81b8579dafb113e8213e9e1f7c5996b70534",
  "url": "https://osv.dev/vulnerability/CVE-2026-12246",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-12246",
    "summary": "NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the address family will overwrite the stack when the zone is written to disk, with a maximum of 111 attacker controlled bytes.",
    "evidence": "osv:CVE-2026-12246",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-12246",
      "aliases": [
        "CVE-2026-12246"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nlnetlabs/nsd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5c760d0f00e282e1626cbadfc67e8bb11744f20b"
                },
                {
                  "fixed": "fc930b88cb4f628defae9835449065945bda7ddc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nlnetlabs:nsd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.14.0"
                      },
                      {
                        "fixed": "4.14.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12246.json"
          }
        }
      ],
      "modified": "2026-10-27T02:30:47.513902290Z",
      "provider": "osv",
      "references": [
        "https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12246.txt"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-12246",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 460050,
  "published_at": "2026-06-25T07:16:45.197+00:00"
}