RHSA-2026:57189: Important: bind security update

Published Aug 19, 2026
·
Updated

Important: bind 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): bind: BIND 9 server memory exhaustion during GSS-API TKEY negotiation (CVE-2026-3039) bind: BIND: Denial of Service via specially crafted DNS messages (CVE-2026-5946) 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

52 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux Server - AUS
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
Red Hat Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
redhat/bind<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-chroot<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-debugsource<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-dnssec-doc<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-dnssec-utils<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-dnssec-utils-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-libs<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-libs-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-license<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-utils<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-utils-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/python3-bind<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-chroot<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-debugsource<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-dnssec-utils<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-dnssec-utils-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-libs<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-libs-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-utils<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-utils-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind<9.16.23-18.el9_4.12.aa
9.16.23-18.el9_4.12.aa
redhat/bind-chroot<9.16.23-18.el9_4.12.aa
9.16.23-18.el9_4.12.aa
redhat/bind-debuginfo<9.16.23-18.el9_4.12.aa
9.16.23-18.el9_4.12.aa
redhat/bind-debugsource<9.16.23-18.el9_4.12.aa
9.16.23-18.el9_4.12.aa
redhat/bind-dnssec-utils<9.16.23-18.el9_4.12.aa
9.16.23-18.el9_4.12.aa
redhat/bind-dnssec-utils-debuginfo<9.16.23-18.el9_4.12.aa
9.16.23-18.el9_4.12.aa
redhat/bind-libs<9.16.23-18.el9_4.12.aa
9.16.23-18.el9_4.12.aa
redhat/bind-libs-debuginfo<9.16.23-18.el9_4.12.aa
9.16.23-18.el9_4.12.aa
redhat/bind-utils<9.16.23-18.el9_4.12.aa
9.16.23-18.el9_4.12.aa
redhat/bind-utils-debuginfo<9.16.23-18.el9_4.12.aa
9.16.23-18.el9_4.12.aa
redhat/bind-chroot<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-debugsource<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-dnssec-utils<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-dnssec-utils-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-libs<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-libs-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-utils<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12
redhat/bind-utils-debuginfo<9.16.23-18.el9_4.12
9.16.23-18.el9_4.12

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/bind to a version that resolves this vulnerability.

    Fixed in 9.16.23-18.el9_4.12
  2. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  3. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  4. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  5. Upgrade

    Upgrade redhat/bind-dnssec-doc to a version that resolves this vulnerability.

    Fixed in 9.16.23-18.el9_4.12
  6. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  7. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  8. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  9. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  10. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  11. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  12. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  13. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12
  14. Upgrade

    Upgrade redhat/bind to a version that resolves this vulnerability.

    Fixed in 9.16.23-18.el9_4.12.aa
  15. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12.aa
  16. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12.aa
  17. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12.aa
  18. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12.aa
  19. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12.aa
  20. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12.aa
  21. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12.aa
  22. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12.aa
  23. Upgrade

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

    Fixed in 9.16.23-18.el9_4.12.aa

Event History

Aug 19, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·10:55 PM
Data Sourced
via Red Hat·10:55 PM
Severity

Frequently Asked Questions

1

Which BIND components are included in this update?

The update covers the BIND server and related packages listed in the advisory, including bind, bind-chroot, bind-libs, bind-dnssec-utils, and their debugging packages.

2

What security impacts are addressed?

The fixes address denial-of-service conditions, including memory exhaustion and unexpected exits, as well as DNSSEC validation bypass, cache poisoning, wildcard CNAME RPZ policy bypass, incorrect NSEC3 acceptance, and memory use beyond configured limits.

3

Which systems are most relevant to triage first?

Prioritize systems running BIND as a DNS server, particularly those using GSS-API TKEY negotiation, DNSSEC validation, response policy zones, or configurations where DNS cache integrity and memory limits are security-sensitive.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203