This update for bind fixes the following issues:
CVE-2026-10723: accepting incorrect child-zone NSEC3 records as valid can allow an attacker to forge authenticated NXDOMAIN responses for sibling zones (bsc#1271982).
CVE-2026-10822: storing a DNS key record with an invalid PRIVATEDNS algorithm identifier length can trigger a consistency check failure (bsc#1271983).
CVE-2026-11331: handling NAMETOOLONG error conditions incorrectly during RPZ wildcard CNAME processing can allow bypassing RPZ rules or triggering process exits (bsc#1271984).
CVE-2026-11622: DNSSEC validating resolver under a random subdomain attack can suffer from runaway memory usage exceeding max-cache-size and affecting response rate (bsc#1271986).
CVE-2026-11721: RRSIG with fewer labels than its containing zone when synth-from-dnssec is enabled can lead to wildcard generation (bsc#1271987).
CVE-2026-12617: delayed or specific CNAME/DNAME query responses combined with positive A record responses can trigger an assertion failure (bsc#1271988).
CVE-2026-13204: validating a domain covered by both NSEC and NSEC3 with an RRSIG for only one type can trigger an assertion failure (bsc#1271989).
CVE-2026-13321: NSEC records with a Next Domain Name pointing outside the signer's zone can allow cross-zone cache
poisoning and authenticated denial-of-service responses (bsc#1271990).
Update to release 9.18.50: