RHSA-2026:54510HighCVSS 8.6

Red Hat Security Advisory: bind security update

Published
August 13, 2026
Last Modified
September 1, 2026

🔗 CVE IDs covered (6)

CVE-2026-11331 →CVE-2026-11622 →CVE-2026-11721 →CVE-2026-13204 →CVE-2026-13321 →CVE-2026-10723 →

📋 Description

CVE-2026-10723 — bind: bind9: Incorrect acceptance of NSEC3 records CVE-2026-11331 — bind9: bind: Potential wildcard CNAME RPZ policy bypass CVE-2026-11622 — bind: bind9: Potential memory usage beyond configured limits CVE-2026-11721 — bind: bind9: Cache poisoning via label count discrepancy, RRSIG, wildcards CVE-2026-13204 — bind: bind9: Unexpected exit with NSEC and NSEC3 both present CVE-2026-13321 — bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field

🎯 Affected products78

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-32:9.16.23-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-32:9.16.23-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-32:9.16.23-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-32:9.16.23-40.el9_8.8.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-32:9.16.23-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-chroot-32:9.16.23-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-chroot-32:9.16.23-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-chroot-32:9.16.23-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-chroot-32:9.16.23-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-debuginfo-32:9.16.23-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-debuginfo-32:9.16.23-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-debuginfo-32:9.16.23-40.el9_8.8.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-debuginfo-32:9.16.23-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-debuginfo-32:9.16.23-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-debuginfo-32:9.16.23-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-debuginfo-32:9.16.23-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-debuginfo-32:9.16.23-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-debuginfo-32:9.16.23-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-debugsource-32:9.16.23-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-debugsource-32:9.16.23-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-debugsource-32:9.16.23-40.el9_8.8.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-debugsource-32:9.16.23-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-debugsource-32:9.16.23-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-debugsource-32:9.16.23-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-debugsource-32:9.16.23-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-debugsource-32:9.16.23-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bind-debugsource-32:9.16.23-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • bind-devel-32:9.16.23-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • +48 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Disclaimer: The following mitigation notes are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure. ISC states no workarounds exist. Until patched, restrict the resolver to authorized client networks and deploy separate resolvers per trust zone. Memory hardening and auth controls don't apply — this is a DNS protocol logic error using validly-signed records.

🔗 References (9)