RHSA-2026:54509: Important: bind9.16 security update

Published Aug 13, 2026
·
Updated

Important: bind9.16 security update

Other sources

The Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols. BIND includes a DNS server (named); a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating correctly.Security Fix(es): bind9: bind: Potential wildcard CNAME RPZ policy bypass (CVE-2026-11331) bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field (CVE-2026-13321) bind: bind9: Potential memory usage beyond configured limits (CVE-2026-11622) bind: bind9: Cache poisoning via label count discrepancy, RRSIG, wildcards (CVE-2026-11721) bind: bind9: Unexpected exit with NSEC and NSEC3 both present (CVE-2026-13204) bind: bind9: Incorrect acceptance of NSEC3 records (CVE-2026-10723) 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.

— Red Hat

Affected Software

59 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for Power, little endian
Red Hat Red Hat Enterprise Linux for x86_64
Red Hat Red Hat Enterprise Linux for ARM 64
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat CodeReady Linux Builder for ARM 64
Red Hat Red Hat Enterprise Linux for IBM z Systems
Red Hat Red Hat CodeReady Linux Builder for x86_64
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat CodeReady Linux Builder for Power, little endian
Red Hat Red Hat CodeReady Linux Builder for IBM z Systems
redhat/bind9.16<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-chroot<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-debugsource<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-dnssec-utils<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-dnssec-utils-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-libs<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-libs-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-license<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-utils<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-utils-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/python3-bind9.16<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-chroot<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-debugsource<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-dnssec-utils<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-dnssec-utils-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-libs<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-libs-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-utils<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-utils-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-chroot<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-debugsource<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-dnssec-utils<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-dnssec-utils-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-libs<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-libs-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-utils<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-utils-debuginfo<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa
redhat/bind9.16-chroot<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa
redhat/bind9.16-debuginfo<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa
redhat/bind9.16-debugsource<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa
redhat/bind9.16-dnssec-utils<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa
redhat/bind9.16-dnssec-utils-debuginfo<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa
redhat/bind9.16-libs<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa
redhat/bind9.16-libs-debuginfo<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa
redhat/bind9.16-utils<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa
redhat/bind9.16-utils-debuginfo<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa
redhat/bind9.16-devel<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-devel<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-doc<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-devel<9.16.23-0.22.el8_10.12
9.16.23-0.22.el8_10.12
redhat/bind9.16-devel<9.16.23-0.22.el8_10.12.aa
9.16.23-0.22.el8_10.12.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/bind9.16 to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  2. Upgrade

    Upgrade redhat/bind9.16-chroot to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  3. Upgrade

    Upgrade redhat/bind9.16-debuginfo to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  4. Upgrade

    Upgrade redhat/bind9.16-debugsource to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  5. Upgrade

    Upgrade redhat/bind9.16-dnssec-utils to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  6. Upgrade

    Upgrade redhat/bind9.16-dnssec-utils-debuginfo to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  7. Upgrade

    Upgrade redhat/bind9.16-libs to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  8. Upgrade

    Upgrade redhat/bind9.16-libs-debuginfo to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  9. Upgrade

    Upgrade redhat/bind9.16-license to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  10. Upgrade

    Upgrade redhat/bind9.16-utils to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  11. Upgrade

    Upgrade redhat/bind9.16-utils-debuginfo to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  12. Upgrade

    Upgrade redhat/python3-bind9.16 to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  13. Upgrade

    Upgrade redhat/bind9.16 to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  14. Upgrade

    Upgrade redhat/bind9.16-chroot to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  15. Upgrade

    Upgrade redhat/bind9.16-debuginfo to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  16. Upgrade

    Upgrade redhat/bind9.16-debugsource to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  17. Upgrade

    Upgrade redhat/bind9.16-dnssec-utils to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  18. Upgrade

    Upgrade redhat/bind9.16-dnssec-utils-debuginfo to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  19. Upgrade

    Upgrade redhat/bind9.16-libs to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  20. Upgrade

    Upgrade redhat/bind9.16-libs-debuginfo to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  21. Upgrade

    Upgrade redhat/bind9.16-utils to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  22. Upgrade

    Upgrade redhat/bind9.16-utils-debuginfo to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  23. Upgrade

    Upgrade redhat/bind9.16-devel to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  24. Upgrade

    Upgrade redhat/bind9.16-doc to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12
  25. Upgrade

    Upgrade redhat/bind9.16-devel to a version that resolves this vulnerability.

    Fixed in 9.16.23-0.22.el8_10.12.aa
  26. Upgrade

    Upgrade bind9 (named/bind9.16) to a version that resolves this vulnerability.

    Fixed in bind9.16
  27. Compensating control

    Until the bind9.16 security update is applied, mitigate BIND DNS risks by restricting DNS query access to trusted networks/clients (e.g., via firewall/ACL) to reduce exposure to cache-poisoning and DNSSEC-validation bypass attempts.

Event History

Aug 13, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·09:10 AM
Data Sourced
via Red Hat·09:10 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:54509?

The severity of RHSA-2026:54509 is rated as high with a score of 7.

2

How do I fix RHSA-2026:54509?

To fix RHSA-2026:54509, apply the latest security update for BIND 9.16 provided by Red Hat.

3

What is affected by RHSA-2026:54509?

RHSA-2026:54509 affects the BIND 9.16 implementation in various Red Hat packages including bind9.16 and its associated libraries.

4

What vulnerabilities are addressed in RHSA-2026:54509?

RHSA-2026:54509 addresses security flaws in BIND that could potentially lead to denial-of-service attacks or data leaks.

5

What is the importance of applying RHSA-2026:54509 promptly?

Applying RHSA-2026:54509 promptly is crucial to maintain the security and integrity of DNS operations in your environment.

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RHSA-2026:54509 - Important: bind9.16 security update - SecAlerts