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"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-2026-19667", "cwe": { "id": "CWE-190", "name": "Integer Overflow or Wraparound" }, "discovery_date": "2026-09-16T00:00:00+00:00", "flags": [ { "label": "vulnerable_code_not_present", "product_ids": [ "red_hat_enterprise_linux_6:bind", "red_hat_enterprise_linux_6:bind-chroot", "red_hat_enterprise_linux_6:bind-devel", "red_hat_enterprise_linux_6:bind-libs", "red_hat_enterprise_linux_6:bind-sdb", "red_hat_enterprise_linux_6:bind-utils", "red_hat_enterprise_linux_6:bind.src", "red_hat_enterprise_linux_9:dhcp-client", "red_hat_enterprise_linux_9:dhcp-common", "red_hat_enterprise_linux_9:dhcp-relay", "red_hat_enterprise_linux_9:dhcp-server", "red_hat_enterprise_linux_9:dhcp.src" ] } ], "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2535435" } ], "notes": [ { "category": "description", "text": "A flaw was found in `bind9`'s `named` component. A remote attacker, by sending a specially crafted DNS negative answer of exactly 65536 bytes from an authoritative server, can cause a 16-bit length truncation. This results in a zero-byte negative cache entry. When `named` attempts to read this invalid entry, it will unexpectedly terminate, leading to a Denial of Service (DoS).", "title": "Vulnerability description" }, { "category": "summary", "text": "bind9: bind: BIND 9: Denial of Service via 16-bit length truncation in DNS negative cache handling", "title": "Vulnerability summary" }, { "category": "other", "text": "This is an Important denial of service flaw in BIND 9's `named` service. An attacker-controlled authoritative server can trigger a `named` abort by sending a precisely sized negative DNS answer. This vulnerability primarily affects BIND instances configured as recursive resolvers that query untrusted authoritative servers, leading to service disruption.", "title": "Statement" }, { "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_enterprise_linux_10:bind", "red_hat_enterprise_linux_10:bind-chroot", "red_hat_enterprise_linux_10:bind-devel", "red_hat_enterprise_linux_10:bind-dnssec-utils", "red_hat_enterprise_linux_10:bind-doc", "red_hat_enterprise_linux_10:bind-libs", "red_hat_enterprise_linux_10:bind-license", "red_hat_enterprise_linux_10:bind-utils", "red_hat_enterprise_linux_10:bind.src", "red_hat_enterprise_linux_7:bind", "red_hat_enterprise_linux_7:bind-chroot", "red_hat_enterprise_linux_7:bind-devel", 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"red_hat_enterprise_linux_9:bind-devel", "red_hat_enterprise_linux_9:bind-dnssec-doc", "red_hat_enterprise_linux_9:bind-dnssec-utils", "red_hat_enterprise_linux_9:bind-doc", "red_hat_enterprise_linux_9:bind-libs", "red_hat_enterprise_linux_9:bind-license", "red_hat_enterprise_linux_9:bind-utils", "red_hat_enterprise_linux_9:bind.src", "red_hat_enterprise_linux_9:bind9.18", "red_hat_enterprise_linux_9:bind9.18-chroot", "red_hat_enterprise_linux_9:bind9.18-devel", "red_hat_enterprise_linux_9:bind9.18-dnssec-utils", "red_hat_enterprise_linux_9:bind9.18-doc", "red_hat_enterprise_linux_9:bind9.18-libs", "red_hat_enterprise_linux_9:bind9.18-utils", "red_hat_enterprise_linux_9:bind9.18.src", "red_hat_enterprise_linux_9:python3-bind", "red_hat_hardened_images:bind.src", "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8", "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9" ], "known_not_affected": [ "red_hat_enterprise_linux_6:bind", "red_hat_enterprise_linux_6:bind-chroot", "red_hat_enterprise_linux_6:bind-devel", "red_hat_enterprise_linux_6:bind-libs", "red_hat_enterprise_linux_6:bind-sdb", "red_hat_enterprise_linux_6:bind-utils", "red_hat_enterprise_linux_6:bind.src", "red_hat_enterprise_linux_9:dhcp-client", "red_hat_enterprise_linux_9:dhcp-common", "red_hat_enterprise_linux_9:dhcp-relay", "red_hat_enterprise_linux_9:dhcp-server", "red_hat_enterprise_linux_9:dhcp.src" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2026-19667" }, { "category": "external", "summary": "RHBZ#2535435", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2535435" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2026-19667", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19667" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-19667", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19667" }, { "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-2026-19667", "url": "https://kb.isc.org/docs/cve-2026-19667" } ], "release_date": "2026-09-16T13:46:56.783000+00:00", "remediations": [ { "category": "workaround", "details": "To reduce the exposure to this vulnerability, configure BIND 9 to forward all DNS queries to trusted, non-vulnerable upstream DNS servers. This prevents the local `named` instance from directly interacting with potentially malicious authoritative servers.\n\nExample configuration in `named.conf`:\n```\noptions {\n forwarders { 192.0.2.1; 192.0.2.2; };\n forward only;\n};\n```\nReplace `192.0.2.1` and `192.0.2.2` with the IP addresses of your trusted upstream DNS servers. After modifying the configuration, restart the `named` service for the changes to take effect. This configuration may impact DNS resolution if the configured forwarders are unavailable or do not provide comprehensive resolution.", "product_ids": [ "red_hat_enterprise_linux_10:bind", "red_hat_enterprise_linux_10:bind-chroot", "red_hat_enterprise_linux_10:bind-devel", "red_hat_enterprise_linux_10:bind-dnssec-utils", "red_hat_enterprise_linux_10:bind-doc", "red_hat_enterprise_linux_10:bind-libs", "red_hat_enterprise_linux_10:bind-license", "red_hat_enterprise_linux_10:bind-utils", "red_hat_enterprise_linux_10:bind.src", "red_hat_enterprise_linux_7:bind", "red_hat_enterprise_linux_7:bind-chroot", "red_hat_enterprise_linux_7:bind-devel", "red_hat_enterprise_linux_7:bind-export-devel", "red_hat_enterprise_linux_7:bind-export-libs", "red_hat_enterprise_linux_7:bind-libs", "red_hat_enterprise_linux_7:bind-libs-lite", "red_hat_enterprise_linux_7:bind-license", "red_hat_enterprise_linux_7:bind-lite-devel", "red_hat_enterprise_linux_7:bind-pkcs11", "red_hat_enterprise_linux_7:bind-pkcs11-devel", "red_hat_enterprise_linux_7:bind-pkcs11-libs", "red_hat_enterprise_linux_7:bind-pkcs11-utils", "red_hat_enterprise_linux_7:bind-sdb", "red_hat_enterprise_linux_7:bind-sdb-chroot", "red_hat_enterprise_linux_7:bind-utils", "red_hat_enterprise_linux_7:bind.src", "red_hat_enterprise_linux_8:bind", "red_hat_enterprise_linux_8:bind-chroot", "red_hat_enterprise_linux_8:bind-devel", "red_hat_enterprise_linux_8:bind-export-devel", "red_hat_enterprise_linux_8:bind-export-libs", "red_hat_enterprise_linux_8:bind-libs", "red_hat_enterprise_linux_8:bind-libs-lite", "red_hat_enterprise_linux_8:bind-license", "red_hat_enterprise_linux_8:bind-lite-devel", "red_hat_enterprise_linux_8:bind-pkcs11", "red_hat_enterprise_linux_8:bind-pkcs11-devel", "red_hat_enterprise_linux_8:bind-pkcs11-libs", "red_hat_enterprise_linux_8:bind-pkcs11-utils", "red_hat_enterprise_linux_8:bind-sdb", "red_hat_enterprise_linux_8:bind-sdb-chroot", 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"red_hat_enterprise_linux_9:bind9.18", "red_hat_enterprise_linux_9:bind9.18-chroot", "red_hat_enterprise_linux_9:bind9.18-devel", "red_hat_enterprise_linux_9:bind9.18-dnssec-utils", "red_hat_enterprise_linux_9:bind9.18-doc", "red_hat_enterprise_linux_9:bind9.18-libs", "red_hat_enterprise_linux_9:bind9.18-utils", "red_hat_enterprise_linux_9:bind9.18.src", "red_hat_enterprise_linux_9:python3-bind", "red_hat_hardened_images:bind.src", "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8", "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9" ] }, { "category": "none_available", "details": "Affected", "product_ids": [ "red_hat_enterprise_linux_10:bind", "red_hat_enterprise_linux_10:bind-chroot", "red_hat_enterprise_linux_10:bind-devel", "red_hat_enterprise_linux_10:bind-dnssec-utils", "red_hat_enterprise_linux_10:bind-doc", "red_hat_enterprise_linux_10:bind-libs", "red_hat_enterprise_linux_10:bind-license", "red_hat_enterprise_linux_10:bind-utils", 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"red_hat_enterprise_linux_8:bind-libs", "red_hat_enterprise_linux_8:bind-libs-lite", "red_hat_enterprise_linux_8:bind-license", "red_hat_enterprise_linux_8:bind-lite-devel", "red_hat_enterprise_linux_8:bind-pkcs11", "red_hat_enterprise_linux_8:bind-pkcs11-devel", "red_hat_enterprise_linux_8:bind-pkcs11-libs", "red_hat_enterprise_linux_8:bind-pkcs11-utils", "red_hat_enterprise_linux_8:bind-sdb", "red_hat_enterprise_linux_8:bind-sdb-chroot", "red_hat_enterprise_linux_8:bind-utils", "red_hat_enterprise_linux_8:bind.src", "red_hat_enterprise_linux_8:bind9.16", "red_hat_enterprise_linux_8:bind9.16-chroot", "red_hat_enterprise_linux_8:bind9.16-devel", "red_hat_enterprise_linux_8:bind9.16-dnssec-utils", "red_hat_enterprise_linux_8:bind9.16-doc", "red_hat_enterprise_linux_8:bind9.16-libs", "red_hat_enterprise_linux_8:bind9.16-license", "red_hat_enterprise_linux_8:bind9.16-utils", "red_hat_enterprise_linux_8:bind9.16.src", "red_hat_enterprise_linux_8:python3-bind", "red_hat_enterprise_linux_8:python3-bind9.16", "red_hat_enterprise_linux_9:bind", "red_hat_enterprise_linux_9:bind-chroot", "red_hat_enterprise_linux_9:bind-devel", "red_hat_enterprise_linux_9:bind-dnssec-doc", "red_hat_enterprise_linux_9:bind-dnssec-utils", "red_hat_enterprise_linux_9:bind-doc", "red_hat_enterprise_linux_9:bind-libs", "red_hat_enterprise_linux_9:bind-license", "red_hat_enterprise_linux_9:bind-utils", "red_hat_enterprise_linux_9:bind.src", "red_hat_enterprise_linux_9:bind9.18", "red_hat_enterprise_linux_9:bind9.18-chroot", "red_hat_enterprise_linux_9:bind9.18-devel", "red_hat_enterprise_linux_9:bind9.18-dnssec-utils", "red_hat_enterprise_linux_9:bind9.18-doc", "red_hat_enterprise_linux_9:bind9.18-libs", "red_hat_enterprise_linux_9:bind9.18-utils", "red_hat_enterprise_linux_9:bind9.18.src", "red_hat_enterprise_linux_9:python3-bind", "red_hat_hardened_images:bind.src", "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_enterprise_linux_10:bind", "red_hat_enterprise_linux_10:bind-chroot", "red_hat_enterprise_linux_10:bind-devel", "red_hat_enterprise_linux_10:bind-dnssec-utils", "red_hat_enterprise_linux_10:bind-doc", "red_hat_enterprise_linux_10:bind-libs", "red_hat_enterprise_linux_10:bind-license", "red_hat_enterprise_linux_10:bind-utils", "red_hat_enterprise_linux_10:bind.src", "red_hat_enterprise_linux_6:bind", "red_hat_enterprise_linux_6:bind-chroot", "red_hat_enterprise_linux_6:bind-devel", "red_hat_enterprise_linux_6:bind-libs", 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"red_hat_enterprise_linux_8:bind-export-devel", "red_hat_enterprise_linux_8:bind-export-libs", "red_hat_enterprise_linux_8:bind-libs", "red_hat_enterprise_linux_8:bind-libs-lite", "red_hat_enterprise_linux_8:bind-license", "red_hat_enterprise_linux_8:bind-lite-devel", "red_hat_enterprise_linux_8:bind-pkcs11", "red_hat_enterprise_linux_8:bind-pkcs11-devel", "red_hat_enterprise_linux_8:bind-pkcs11-libs", "red_hat_enterprise_linux_8:bind-pkcs11-utils", "red_hat_enterprise_linux_8:bind-sdb", "red_hat_enterprise_linux_8:bind-sdb-chroot", "red_hat_enterprise_linux_8:bind-utils", "red_hat_enterprise_linux_8:bind.src", "red_hat_enterprise_linux_8:bind9.16", "red_hat_enterprise_linux_8:bind9.16-chroot", "red_hat_enterprise_linux_8:bind9.16-devel", "red_hat_enterprise_linux_8:bind9.16-dnssec-utils", "red_hat_enterprise_linux_8:bind9.16-doc", "red_hat_enterprise_linux_8:bind9.16-libs", "red_hat_enterprise_linux_8:bind9.16-license", "red_hat_enterprise_linux_8:bind9.16-utils", "red_hat_enterprise_linux_8:bind9.16.src", "red_hat_enterprise_linux_8:python3-bind", "red_hat_enterprise_linux_8:python3-bind9.16", "red_hat_enterprise_linux_9:bind", "red_hat_enterprise_linux_9:bind-chroot", "red_hat_enterprise_linux_9:bind-devel", "red_hat_enterprise_linux_9:bind-dnssec-doc", "red_hat_enterprise_linux_9:bind-dnssec-utils", "red_hat_enterprise_linux_9:bind-doc", "red_hat_enterprise_linux_9:bind-libs", "red_hat_enterprise_linux_9:bind-license", "red_hat_enterprise_linux_9:bind-utils", "red_hat_enterprise_linux_9:bind.src", "red_hat_enterprise_linux_9:bind9.18", "red_hat_enterprise_linux_9:bind9.18-chroot", "red_hat_enterprise_linux_9:bind9.18-devel", "red_hat_enterprise_linux_9:bind9.18-dnssec-utils", "red_hat_enterprise_linux_9:bind9.18-doc", "red_hat_enterprise_linux_9:bind9.18-libs", "red_hat_enterprise_linux_9:bind9.18-utils", "red_hat_enterprise_linux_9:bind9.18.src", "red_hat_enterprise_linux_9:dhcp-client", "red_hat_enterprise_linux_9:dhcp-common", "red_hat_enterprise_linux_9:dhcp-relay", "red_hat_enterprise_linux_9:dhcp-server", "red_hat_enterprise_linux_9:dhcp.src", "red_hat_enterprise_linux_9:python3-bind", "red_hat_hardened_images:bind.src", "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_enterprise_linux_10:bind", "red_hat_enterprise_linux_10:bind-chroot", "red_hat_enterprise_linux_10:bind-devel", "red_hat_enterprise_linux_10:bind-dnssec-utils", "red_hat_enterprise_linux_10:bind-doc", "red_hat_enterprise_linux_10:bind-libs", "red_hat_enterprise_linux_10:bind-license", "red_hat_enterprise_linux_10:bind-utils", "red_hat_enterprise_linux_10:bind.src", "red_hat_enterprise_linux_6:bind", "red_hat_enterprise_linux_6:bind-chroot", "red_hat_enterprise_linux_6:bind-devel", "red_hat_enterprise_linux_6:bind-libs", "red_hat_enterprise_linux_6:bind-sdb", "red_hat_enterprise_linux_6:bind-utils", "red_hat_enterprise_linux_6:bind.src", "red_hat_enterprise_linux_7:bind", "red_hat_enterprise_linux_7:bind-chroot", "red_hat_enterprise_linux_7:bind-devel", "red_hat_enterprise_linux_7:bind-export-devel", "red_hat_enterprise_linux_7:bind-export-libs", "red_hat_enterprise_linux_7:bind-libs", "red_hat_enterprise_linux_7:bind-libs-lite", "red_hat_enterprise_linux_7:bind-license", "red_hat_enterprise_linux_7:bind-lite-devel", "red_hat_enterprise_linux_7:bind-pkcs11", "red_hat_enterprise_linux_7:bind-pkcs11-devel", "red_hat_enterprise_linux_7:bind-pkcs11-libs", "red_hat_enterprise_linux_7:bind-pkcs11-utils", "red_hat_enterprise_linux_7:bind-sdb", "red_hat_enterprise_linux_7:bind-sdb-chroot", "red_hat_enterprise_linux_7:bind-utils", "red_hat_enterprise_linux_7:bind.src", "red_hat_enterprise_linux_8:bind", "red_hat_enterprise_linux_8:bind-chroot", "red_hat_enterprise_linux_8:bind-devel", "red_hat_enterprise_linux_8:bind-export-devel", "red_hat_enterprise_linux_8:bind-export-libs", "red_hat_enterprise_linux_8:bind-libs", "red_hat_enterprise_linux_8:bind-libs-lite", "red_hat_enterprise_linux_8:bind-license", "red_hat_enterprise_linux_8:bind-lite-devel", "red_hat_enterprise_linux_8:bind-pkcs11", "red_hat_enterprise_linux_8:bind-pkcs11-devel", "red_hat_enterprise_linux_8:bind-pkcs11-libs", "red_hat_enterprise_linux_8:bind-pkcs11-utils", "red_hat_enterprise_linux_8:bind-sdb", "red_hat_enterprise_linux_8:bind-sdb-chroot", "red_hat_enterprise_linux_8:bind-utils", "red_hat_enterprise_linux_8:bind.src", "red_hat_enterprise_linux_8:bind9.16", "red_hat_enterprise_linux_8:bind9.16-chroot", "red_hat_enterprise_linux_8:bind9.16-devel", "red_hat_enterprise_linux_8:bind9.16-dnssec-utils", "red_hat_enterprise_linux_8:bind9.16-doc", "red_hat_enterprise_linux_8:bind9.16-libs", "red_hat_enterprise_linux_8:bind9.16-license", "red_hat_enterprise_linux_8:bind9.16-utils", "red_hat_enterprise_linux_8:bind9.16.src", "red_hat_enterprise_linux_8:python3-bind", "red_hat_enterprise_linux_8:python3-bind9.16", "red_hat_enterprise_linux_9:bind", "red_hat_enterprise_linux_9:bind-chroot", "red_hat_enterprise_linux_9:bind-devel", "red_hat_enterprise_linux_9:bind-dnssec-doc", "red_hat_enterprise_linux_9:bind-dnssec-utils", "red_hat_enterprise_linux_9:bind-doc", "red_hat_enterprise_linux_9:bind-libs", "red_hat_enterprise_linux_9:bind-license", "red_hat_enterprise_linux_9:bind-utils", "red_hat_enterprise_linux_9:bind.src", "red_hat_enterprise_linux_9:bind9.18", "red_hat_enterprise_linux_9:bind9.18-chroot", "red_hat_enterprise_linux_9:bind9.18-devel", "red_hat_enterprise_linux_9:bind9.18-dnssec-utils", "red_hat_enterprise_linux_9:bind9.18-doc", "red_hat_enterprise_linux_9:bind9.18-libs", "red_hat_enterprise_linux_9:bind9.18-utils", "red_hat_enterprise_linux_9:bind9.18.src", "red_hat_enterprise_linux_9:dhcp-client", "red_hat_enterprise_linux_9:dhcp-common", "red_hat_enterprise_linux_9:dhcp-relay", "red_hat_enterprise_linux_9:dhcp-server", "red_hat_enterprise_linux_9:dhcp.src", "red_hat_enterprise_linux_9:python3-bind", "red_hat_hardened_images:bind.src", "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8", "red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9" ] } ], "title": "bind9: bind: BIND 9: Denial of Service via 16-bit length truncation in DNS negative cache handling" } ] }