MGASA-2026-0422 Updated bind package fixes security vulnerabilities

Unauthenticated IXFR deltas are applied to the live zone before TSIG verification CVE-2026-19033. qpcache NOQNAME proof use-after-free crashes recursive resolver CVE-2026-19662. Use-after-free in queryaddnoqnameproof via the DNS64 filter64 path CVE-2026-19666. Remote assertion failure via 16-bit...

CVE-2026-81563 SVCB AliasMode additional-data error leaks qpcache references

A BIND resolver encountering an SVCB/HTTPS AliasMode record referencing 14 or more SVCB/HTTPS ServiceMode records may fail to properly deallocate internal resources. If this happens repeatedly, resource exhaustion will eventually prevent the resolver from performing new recursive lookups. This...

CVE-2026-81563 SVCB AliasMode additional-data error leaks qpcache references

A BIND resolver encountering an SVCB/HTTPS AliasMode record referencing 14 or more SVCB/HTTPS ServiceMode records may fail to properly deallocate internal resources. If this happens repeatedly, resource exhaustion will eventually prevent the resolver from performing new recursive lookups. This...

CVE-2026-81563

CVE-2026-81563 is a resource exhaustion vulnerability in the BIND 9 resolver (ISC). When a resolver encounters an SVCB/HTTPS AliasMode record referencing 14 or more SVCB/HTTPS ServiceMode records , it may fail to properly deallocate internal qpcache references . Repeated occurrences lead to resou...

CVE-2026-19662 qpcache NOQNAME proof use-after-free crashes recursive resolver

An attacker may be able to cause a named resolver to abort. The attack requires inducing the victim resolver to send multiple queries for a DNSSEC-signed zone hosted by an authoritative server under the control of the attacker. If the auth responds with a particular sequence of crafted answers, a...

CVE-2026-19662 qpcache NOQNAME proof use-after-free crashes recursive resolver

An attacker may be able to cause a named resolver to abort. The attack requires inducing the victim resolver to send multiple queries for a DNSSEC-signed zone hosted by an authoritative server under the control of the attacker. If the auth responds with a particular sequence of crafted answers, a...

CVE-2026-19662

CVE-2026-19662 is a use-after-free bug in BIND 9's qpcache (query performance cache) component, specifically in the NOQNAME proof handling. An attacker operating an authoritative server for a DNSSEC-signed zone can induce a recursive resolver to abort by sending crafted answers in a particular se...