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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "BIND 9", "vendor": "ISC", "versions": [{"lessThanOrEqual": "9.18.50", "status": "affected", "version": "9.11.0", "versionType": "custom"}, {"lessThanOrEqual": "9.20.29", "status": "affected", "version": "9.20.0", "versionType": "custom"}, {"lessThanOrEqual": "9.21.26", "status": "affected", "version": "9.21.0", "versionType": "custom"}, {"lessThanOrEqual": "9.18.50-S1", "status": "affected", "version": "9.11.3-S1", "versionType": "custom"}, {"lessThanOrEqual": "9.20.29-S1", "status": "affected", "version": "9.20.9-S1", "versionType": "custom"}]}], "source": "security-officer@isc.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amounts of CPU time and memory during processing.\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1."}], "id": "CVE-2026-19630", "lastModified": "2026-10-21T18:17:28.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-officer@isc.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-19630", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-21T15:19:21.749441Z", "version": "2.0.3"}}]}, "published": "2026-10-21T13:18:32.453", "references": [{"source": "security-officer@isc.org", "url": "https://downloads.isc.org/isc/bind9/9.20.30"}, {"source": "security-officer@isc.org", "url": "https://downloads.isc.org/isc/bind9/9.21.27"}, {"source": "security-officer@isc.org", "url": "https://kb.isc.org/docs/cve-2026-19630"}], "sourceIdentifier": "security-officer@isc.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-407"}], "source": "security-officer@isc.org", "type": "Secondary"}]}

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{"created": "2026-10-21T17:45:07.651690+00:00", "updated": "2026-10-21T17:45:07.651695+00:00", "vendors": []}