RHSA-2026:98525: Important: bind9.18 security update
BIND (Berkeley Internet Name Domain) is an implementation of the DNS (Domain Name System) protocols. BIND includes a DNS server (named), which resolves host names to IP addresses; a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating properly.Security Fix(es): bind: BIND: Denial of Service via unbounded processing of crafted DNS messages (CVE-2026-19630) bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay (CVE-2026-94300) bind: bind: Denial of Service via assertion failure during redirect processing (CVE-2026-96888) bind: bind: Denial of service via assertion failure in RPZ query processing (CVE-2026-97313) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/bind9.18to a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-chrootto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-debuginfoto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-debugsourceto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-dnssec-utilsto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-dnssec-utils-debuginfoto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-libsto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-libs-debuginfoto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-utilsto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-utils-debuginfoto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18to a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa - Upgrade
Upgrade
redhat/bind9.18-chrootto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa - Upgrade
Upgrade
redhat/bind9.18-debuginfoto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa - Upgrade
Upgrade
redhat/bind9.18-debugsourceto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa - Upgrade
Upgrade
redhat/bind9.18-dnssec-utilsto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa - Upgrade
Upgrade
redhat/bind9.18-dnssec-utils-debuginfoto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa - Upgrade
Upgrade
redhat/bind9.18-libsto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa - Upgrade
Upgrade
redhat/bind9.18-libs-debuginfoto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa - Upgrade
Upgrade
redhat/bind9.18-utilsto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa - Upgrade
Upgrade
redhat/bind9.18-utils-debuginfoto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa - Upgrade
Upgrade
redhat/bind9.18-develto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-docto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1 - Upgrade
Upgrade
redhat/bind9.18-develto a version that resolves this vulnerability.Fixed in 9.18.29-29.el9_9.1.aa
Event History
Frequently Asked Questions
Which BIND components are covered by this update?
The advisory lists bind9.18, bind9.18-chroot, bind9.18-libs, bind9.18-dnssec-utils, and their associated debuginfo and debugsource packages.
What types of impact are addressed?
The fixes address denial-of-service conditions involving crafted DNS-message processing, redirect processing, and RPZ query processing. They also address arbitrary code execution through GSS-TSIG UDP message replay.
What attack inputs are identified for these issues?
One denial-of-service issue is triggered by crafted DNS messages. The code-execution issue involves replay of GSS-TSIG messages over UDP; the advisory does not provide further prerequisites or configuration details.