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CVE-2026-19667

Medium priority
Needs evaluation

(If an attacker-controlled authoritative server can produce a negative ...)

3 affected packages

bind9, isc-dhcp, bind9-libs

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bind9 Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
isc-dhcp Needs evaluation Needs evaluation Not affected Not affected Needs evaluation
bind9-libs Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-19666

Medium priority
Needs evaluation

(On a resolver configured to use ``dns64``, if an applicable answer fro ...)

3 affected packages

bind9, isc-dhcp, bind9-libs

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bind9 Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
isc-dhcp Needs evaluation Needs evaluation Not affected Not affected Needs evaluation
bind9-libs Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-19662

Medium priority
Needs evaluation

(An attacker may be able to cause a `named` resolver to abort. The atta ...)

3 affected packages

bind9, isc-dhcp, bind9-libs

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bind9 Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
isc-dhcp Needs evaluation Needs evaluation Not affected Not affected Needs evaluation
bind9-libs Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-19033

Medium priority
Needs evaluation

(For a secondary zone with transfers restricted by TSIG, `named` may st ...)

3 affected packages

bind9, isc-dhcp, bind9-libs

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bind9 Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
isc-dhcp Needs evaluation Needs evaluation Not affected Not affected Needs evaluation
bind9-libs Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-13321

Medium priority

Some fixes available 3 of 12

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23,...

3 affected packages

bind9, isc-dhcp, bind9-libs

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bind9 Fixed Fixed Fixed Needs evaluation Needs evaluation
isc-dhcp Needs evaluation Needs evaluation Not affected Not affected Needs evaluation
bind9-libs Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-13204

Medium priority

Some fixes available 3 of 12

If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof. This...

3 affected packages

bind9, isc-dhcp, bind9-libs

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bind9 Fixed Fixed Fixed Needs evaluation Needs evaluation
isc-dhcp Needs evaluation Needs evaluation Not affected Not affected Needs evaluation
bind9-libs Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-12617

Medium priority

Some fixes available 3 of 12

The issue is unexpected program termination based on ordering and/or specific content in responses to queries for CNAME or DNAME, and A records. Specifically, if a client queries for a DNAME and A record below the DNAME to the...

3 affected packages

bind9, isc-dhcp, bind9-libs

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bind9 Fixed Fixed Fixed Needs evaluation Needs evaluation
isc-dhcp Needs evaluation Needs evaluation Not affected Not affected Needs evaluation
bind9-libs Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-11721

Medium priority

Some fixes available 3 of 12

It is possible for an attacker's zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes `named` to produce a wildcard name for a zone that is shorter...

3 affected packages

bind9, isc-dhcp, bind9-libs

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bind9 Fixed Fixed Fixed Needs evaluation Needs evaluation
isc-dhcp Needs evaluation Needs evaluation Not affected Not affected Needs evaluation
bind9-libs Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-11622

Medium priority

Some fixes available 3 of 12

A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation....

3 affected packages

bind9, isc-dhcp, bind9-libs

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bind9 Fixed Fixed Fixed Needs evaluation Needs evaluation
isc-dhcp Needs evaluation Needs evaluation Not affected Not affected Needs evaluation
bind9-libs Not in release Not in release Needs evaluation Needs evaluation
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CVE-2026-11605

Medium priority
Fixed

The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns...

3 affected packages

bind9, isc-dhcp, bind9-libs

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bind9 Fixed Not affected Not affected Not affected Not affected
isc-dhcp Not affected Not affected Not affected Not affected Not affected
bind9-libs Not in release Not in release Not affected Not affected
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