CVE-2026-19662

{
  "id": "CVE-2026-19662",
  "sourceIdentifier": "[email protected]",
  "published": "2026-09-16T14:17:04.900",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An attacker may be able to cause a `named` resolver to abort. The attack requires inducing the victim resolver to send multiple queries for a DNSSEC-signed zone hosted by an authoritative server under the control of the attacker. If the auth responds with a particular sequence of crafted answers, and those answers arrive in a particular order with particular timing, the `named` resolver will encounter a use-after-free bug, and abort.\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1."
    },
    {
      "lang": "es",
      "value": "Un atacante podría provocar que un resolver “named” se abortara. El ataque requiere inducir al resolver víctima a enviar múltiples consultas para una zona firmada con DNSSEC alojada en un servidor autoritativo bajo el control del atacante. Si la autoridad responde con una secuencia particular de respuestas manipuladas, y esas respuestas llegan en un orden específico con una temporización particular, el resolver “named” encontrará un error de uso después de liberación y se abortará.  \\nEste problema afecta a BIND?9 desde la versión?9.11.0 hasta la versión?9.18.50 incluida, desde la versión?9.20.0 hasta la versión?9.20.27 incluida, desde la versión?9.11.3?S1 hasta la versión?9.18.50?S1 incluida, y desde la versión?9.20.9?S1 hasta la versión?9.20.27?S1 incluida."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "ISC",
          "product": "BIND 9",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9.11.0",
              "lessThanOrEqual": "9.18.50",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "9.20.0",
              "lessThanOrEqual": "9.20.27",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "9.11.3-S1",
              "lessThanOrEqual": "9.18.50-S1",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "9.20.9-S1",
              "lessThanOrEqual": "9.20.27-S1",
              "versionType": "custom",
              "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:U/C:N/I:N/A:H",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-09-17T18:44:50.752130Z",
          "id": "CVE-2026-19662",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://downloads.isc.org/isc/bind9/9.20.29",
      "source": "[email protected]"
    },
    {
      "url": "https://kb.isc.org/docs/cve-2026-19662",
      "source": "[email protected]"
    }
  ]
}