Issued at: 2026-08-17
Updated at: 2026-08-18
Advisory content derived from Red Hat RHSA-2026:55437, © Red Hat, Inc., used under CC BY 4.0, with modifications.
Synopsis
Important: bind security update
Description
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.