CVE-2026-66374

{
  "id": "CVE-2026-66374",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-25T01:16:26.423",
  "lastModified": "2026-10-24T13:10:00.147",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path."
    },
    {
      "lang": "es",
      "value": "Knot Resolver anterior a 6.4.1 permite la ejecución remota de código a través de un desbordamiento de búfer basado en montículo en la ruta de recepción de DoQ (DNS-over-QUIC)."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "nic",
          "product": "Knot Resolver",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "6.4.1",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.3
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-27T14:35:53.718782Z",
          "id": "CVE-2026-66374",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1284"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/venglin/knot-doq",
      "source": "[email protected]"
    },
    {
      "url": "https://openwall.com/lists/oss-security/2026/07/23/6",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/venglin/knot-doq",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}