Issued at: 2026-10-06
Updated at: 2026-10-06
Advisory content derived from Red Hat RHSA-2026:75578, © Red Hat, Inc., used under CC BY 4.0, with modifications.
Synopsis
Important: bind9.18 security update
Description
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 9: Remote Denial of Service via cached SVCB/HTTPS AliasMode records (CVE-2026-81736)
* bind9: bind: BIND 9: Denial of Service via 16-bit length truncation in DNS negative cache handling (CVE-2026-19667)
* bind: BIND resolver: Denial of Service due to resource exhaustion in SVCB/HTTPS AliasMode processing (CVE-2026-81563)
* bind: BIND: Denial of Service via crafted DNSSEC reply (CVE-2026-80274)
* bind: BIND: Denial of Service via malformed DNS64 responses (CVE-2026-19666)
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.