{"document":{"aggregate_severity":{"namespace":"https://access.redhat.com/security/updates/classification/","text":"Important"},"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright © Red Hat, Inc. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"legal_disclaimer","text":"This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.","title":"Terms of Use"}],"publisher":{"category":"vendor","contact_details":"https://access.redhat.com/security/team/contact/","issuing_authority":"Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.","name":"Red Hat Product Security","namespace":"https://www.redhat.com"},"references":[{"category":"self","summary":"Canonical URL","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-19666.json"}],"title":"bind: BIND: Denial of Service via malformed DNS64 responses","tracking":{"current_release_date":"2026-09-16T15:19:48+00:00","generator":{"date":"2026-09-16T15:19:48+00:00","engine":{"name":"Red Hat SDEngine","version":"5.3.21"}},"id":"CVE-2026-19666","initial_release_date":"2026-09-16T14:02:30.453000+00:00","revision_history":[{"date":"2026-09-16T14:02:30.453000+00:00","number":"1","summary":"Initial version"},{"date":"2026-09-16T14:54:16.137977+00:00","number":"2","summary":"Current version"},{"date":"2026-09-16T15:19:48+00:00","number":"3","summary":"Last generated version"}],"status":"final","version":"3"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_name","name":"Red Hat OpenShift Container Platform 4","product":{"name":"Red Hat OpenShift Container Platform 4","product_id":"red_hat_openshift_container_platform_4","product_identification_helper":{"cpe":"cpe:/a:redhat:openshift:4"}}}],"category":"product_family","name":"Red Hat OpenShift Container Platform 4"},{"category":"product_version","name":"openshift/ose-rhel-coreos-8","product":{"name":"openshift/ose-rhel-coreos-8","product_id":"openshift/ose-rhel-coreos-8","product_identification_helper":{"purl":"pkg:oci/ose-rhel-coreos-8@412.86.202608241157-0?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-8"}}},{"category":"product_version","name":"openshift/ose-rhel-coreos-9","product":{"name":"openshift/ose-rhel-coreos-9","product_id":"openshift/ose-rhel-coreos-9","product_identification_helper":{"purl":"pkg:oci/ose-rhel-coreos-9@4.22.9.8.202609081748-0?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-9"}}}],"category":"vendor","name":"Red Hat"}],"relationships":[{"category":"default_component_of","full_product_name":{"name":"openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4","product_id":"red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8"},"product_reference":"openshift/ose-rhel-coreos-8","relates_to_product_reference":"red_hat_openshift_container_platform_4"},{"category":"default_component_of","full_product_name":{"name":"openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4","product_id":"red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9"},"product_reference":"openshift/ose-rhel-coreos-9","relates_to_product_reference":"red_hat_openshift_container_platform_4"}]},"vulnerabilities":[{"cve":"CVE-2026-19666","cwe":{"id":"CWE-617","name":"Reachable Assertion"},"discovery_date":"2026-09-16T14:34:53.189451+00:00","ids":[{"system_name":"Red Hat Bugzilla ID","text":"2535477"}],"notes":[{"category":"description","text":"A flaw was found in BIND. When a resolver is configured to use DNS64, a specially crafted, malformed answer from an authoritative server can cause the `named` process to exit unexpectedly. This can lead to a Denial of Service (DoS) for clients relying on the affected resolver.","title":"Vulnerability description"},{"category":"summary","text":"bind: BIND: Denial of Service via malformed DNS64 responses","title":"Vulnerability summary"},{"category":"general","text":"The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.","title":"CVSS score applicability"}],"product_status":{"known_affected":["red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8","red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9"]},"references":[{"category":"self","summary":"Canonical URL","url":"https://access.redhat.com/security/cve/CVE-2026-19666"},{"category":"external","summary":"RHBZ#2535477","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2535477"},{"category":"external","summary":"https://www.cve.org/CVERecord?id=CVE-2026-19666","url":"https://www.cve.org/CVERecord?id=CVE-2026-19666"},{"category":"external","summary":"https://nvd.nist.gov/vuln/detail/CVE-2026-19666","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19666"},{"category":"external","summary":"https://downloads.isc.org/isc/bind9/9.20.29","url":"https://downloads.isc.org/isc/bind9/9.20.29"},{"category":"external","summary":"https://downloads.isc.org/isc/bind9/9.21.26","url":"https://downloads.isc.org/isc/bind9/9.21.26"},{"category":"external","summary":"https://kb.isc.org/docs/cve-2026-19666","url":"https://kb.isc.org/docs/cve-2026-19666"}],"release_date":"2026-09-16T14:02:30.453000+00:00","remediations":[{"category":"none_available","details":"Affected","product_ids":["red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8","red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9"]}],"scores":[{"cvss_v3":{"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"},"products":["red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8","red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9"]}],"threats":[{"category":"impact","details":"Important","product_ids":["red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8","red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9"]}],"title":"bind: BIND: Denial of Service via malformed DNS64 responses"}]}