CVE-2026-3104

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8", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:8"], "defaultStatus": "unaffected", "packageName": "bind9.16", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "unaffected", "packageName": "bind", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "unaffected", "packageName": "bind9.18", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "unaffected", "packageName": "dhcp", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:openshift:4"], "defaultStatus": "unaffected", "packageName": "openshift/ose-rhel-coreos-9", "product": "Red Hat OpenShift Container Platform 4", "vendor": "Red Hat"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*", "matchCriteriaId": "2C0EF5D0-68A6-4E00-985B-523D9B243E49", "versionEndExcluding": "9.20.21", "versionStartIncluding": "9.20.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*", "matchCriteriaId": "B1DD0950-5CBD-49B2-8007-5E96B3C4FB1B", "versionEndExcluding": "9.21.20", "versionStartIncluding": "9.21.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1.\nBIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected."}, {"lang": "es", "value": "Un dominio especialmente dise\u00f1ado puede usarse para causar una fuga de memoria en un resolvedor BIND simplemente al consultar este dominio.\nEste problema afecta a las versiones de BIND 9 desde la 9.20.0 hasta la 9.20.20, desde la 9.21.0 hasta la 9.21.19, y desde la 9.20.9-S1 hasta la 9.20.20-S1.\nLas versiones de BIND 9 desde la 9.18.0 hasta la 9.18.46 y desde la 9.18.11-S1 hasta la 9.18.46-S1 NO se ven afectadas."}], "id": "CVE-2026-3104", "lastModified": "2026-09-01T13:19:16.763", "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"}, {"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": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3104", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-25T14:56:20.362810Z", "version": "2.0.3"}}]}, "published": "2026-03-25T14:16:36.890", "references": [{"source": "security-officer@isc.org", "tags": ["Patch"], "url": "https://downloads.isc.org/isc/bind9/9.20.21"}, {"source": "security-officer@isc.org", "tags": ["Patch"], "url": "https://downloads.isc.org/isc/bind9/9.21.20"}, {"source": "security-officer@isc.org", "tags": ["Vendor Advisory"], "url": "https://kb.isc.org/docs/cve-2026-3104"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:6935"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-3104"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451310"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3104.json"}], "sourceIdentifier": "security-officer@isc.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-772"}], "source": "security-officer@isc.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-772"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "bind: BIND: Denial of Service via specially crafted domain query causing a memory leak", "id": "2451310", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451310"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the BIND resolver. A remote attacker can exploit this vulnerability by querying a specially crafted domain, which causes a memory leak. This memory leak can lead to a Denial of Service (DoS) condition, making the BIND resolver unavailable to legitimate users."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, restrict access to the BIND resolver to trusted clients only. This can be achieved by configuring firewall rules to limit inbound connections to port 53 (UDP/TCP) from known, authorized IP addresses or networks. Alternatively, configure BIND to listen only on specific trusted interfaces or localhost.\nExample using firewalld:\n`firewall-cmd --permanent --add-rich-rule='rule family=\"ipv4\" source address=\"<TRUSTED_IP_OR_NETWORK>\" port port=53 protocol=\"udp\" accept'`\n`firewall-cmd --permanent --add-rich-rule='rule family=\"ipv4\" source address=\"<TRUSTED_IP_OR_NETWORK>\" port port=53 protocol=\"tcp\" accept'`\n`firewall-cmd --reload`\nAfter applying changes, a restart of the BIND service may be required for the new configuration to take full effect. This may temporarily interrupt DNS resolution services."}, "name": "CVE-2026-3104", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "bind", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "bind", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "bind", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "bind", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "bind9.16", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "bind", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "bind9.18", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "dhcp", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-03-25T13:29:19Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-3104\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-3104\nhttps://downloads.isc.org/isc/bind9/9.20.21\nhttps://downloads.isc.org/isc/bind9/9.21.20\nhttps://kb.isc.org/docs/cve-2026-3104"], "statement": "This is an Important denial of service flaw in BIND 9. A remote attacker can trigger a memory leak in the BIND resolver by sending a specially crafted domain query, potentially exhausting system resources. Red Hat Enterprise Linux versions shipping BIND 9.18 are not affected by this vulnerability.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.20.0,9.20.20]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.21.0,9.21.19]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.20.9-S1,9.20.20-S1]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[9.18.0,9.18.46]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[9.18.11-S1,9.18.46-S1]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "BIND 9", "source": "cna", "vendor": "ISC"}, "product": "bind", "vendor": "isc"}], "created": "2026-03-25T21:31:13.441916+00:00", "updated": "2026-05-21T17:30:15.266880+00:00", "vendors": ["isc", "isc$PRODUCT$bind"]}