CVE-2026-19941

BIND 9 's named resolver contains a flaw in its checkwildcard() function that may accept an inapplicable, out-of-zone NSEC record as proof that no wildcard exists. This allows an attacker positioned at the same or an upstream level of the zone name to mask the existence of a victim's wildcard rec...

CVE-2026-19941

An inapplicable NSEC record may be accepted by a named resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0...

CVE-2026-19941 checkwildcard() accepts an out-of-zone NSEC as a wildcard-nonexistence proof

An inapplicable NSEC record may be accepted by a named resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0...

CVE-2026-19941 checkwildcard() accepts an out-of-zone NSEC as a wildcard-nonexistence proof

An inapplicable NSEC record may be accepted by a named resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0...

EUVD-2026-80745

An inapplicable NSEC record may be accepted by a named resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0...

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

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...

EUVD-2026-80743

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...

CVE-2026-19667 Remote assertion failure via 16-bit length truncation in `dns_ncache_add()`

If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in named results in a negative cache entry of 0 bytes. When this entry is subsequently read, named aborts. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 throug...

CVE-2026-19667

If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in named results in a negative cache entry of 0 bytes. When this entry is subsequently read, named aborts. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 throug...

CVE-2026-19667

CVE-2026-19667 is a remote assertion failure in the BIND 9 named daemon, caused by a 16-bit length truncation in dns_ncache_add(). When an attacker-controlled authoritative server returns a negative answer of exactly 65536 bytes , the negative cache entry is stored as 0 bytes; reading that entry ...

EUVD-2026-80742

If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in named results in a negative cache entry of 0 bytes. When this entry is subsequently read, named aborts. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 throug...

CVE-2026-19667 Remote assertion failure via 16-bit length truncation in `dns_ncache_add()`

If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in named results in a negative cache entry of 0 bytes. When this entry is subsequently read, named aborts. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 throug...

CVE-2026-81736 Remote CPU denial of service through cached SVCB/HTTPS AliasMode trees

If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of that tree, the resolver will spend disproportionate CPU time constructing the response. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through...

CVE-2026-81736

If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of that tree, the resolver will spend disproportionate CPU time constructing the response. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through...

CVE-2026-81736 Remote CPU denial of service through cached SVCB/HTTPS AliasMode trees

If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of that tree, the resolver will spend disproportionate CPU time constructing the response. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through...

EUVD-2026-80740

If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of that tree, the resolver will spend disproportionate CPU time constructing the response. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through...

CVE-2026-81736

If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of that tree, the resolver will spend disproportionate CPU time constructing the response. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through...