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CVE-2026-44608

Medium priority

Some fixes available 3 of 4

NLnet Labs Unbound 1.14.0 up to and including version 1.25.0 has a locking inconsistency vulnerability that when certain conditions are met (multi-threaded, RPZ XFR reload, RPZ zone with 'rpz-nsip'/'rpz-nsdname' triggers) it could...

1 affected package

unbound

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
unbound Fixed Fixed Not affected Not affected Not affected
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CVE-2026-44390

Medium priority

Some fixes available 4 of 8

Unbounded name compression in certain cases causes degradation of service

1 affected package

unbound

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
unbound Fixed Fixed Fixed Needs evaluation Needs evaluation
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CVE-2026-42960

Medium priority

Some fixes available 4 of 8

NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to poisoning via promiscuous records for the authority section. Promiscuous RRSets that complement DNS replies in the authority section can be used to trick...

1 affected package

unbound

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
unbound Fixed Fixed Fixed Needs evaluation Needs evaluation
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CVE-2026-42959

Medium priority

Some fixes available 4 of 8

NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead to a crash given malicious upstream replies. When Unbound constructs chase-reply messages for...

1 affected package

unbound

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
unbound Fixed Fixed Fixed Needs evaluation Needs evaluation
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CVE-2026-42944

Medium priority

Some fixes available 3 of 4

NLnet Labs Unbound 1.14.0 up to and including version 1.25.0 has a vulnerability that results in heap overflow when encoding multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options in the reply packet. The relevant...

1 affected package

unbound

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
unbound Fixed Fixed Not affected Not affected Not affected
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CVE-2026-42923

Medium priority

Some fixes available 4 of 8

NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the DNSSEC validator where the code path to consult the negative cache for DS records does not take into account the limit on NSEC3 hash calculations...

1 affected package

unbound

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
unbound Fixed Fixed Fixed Needs evaluation Needs evaluation
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CVE-2026-42534

Medium priority

Some fixes available 4 of 8

NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the jostle logic that could defeat its purpose and degrade resolution performance. Retransmits of the same query could renew the age of slow running...

1 affected package

unbound

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
unbound Fixed Fixed Fixed Needs evaluation Needs evaluation
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CVE-2026-41292

Medium priority

Some fixes available 4 of 8

NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold...

1 affected package

unbound

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
unbound Fixed Fixed Fixed Needs evaluation Needs evaluation
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CVE-2026-40622

Medium priority

Some fixes available 3 of 4

NLnet Labs Unbound 1.16.2 up to and including version 1.25.0 has a vulnerability of the 'ghost domain names' family of attacks that could extend the ghost domain window by up to one cached TTL configured value. Similar to other...

1 affected package

unbound

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
unbound Fixed Fixed Not affected Not affected Not affected
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CVE-2026-33278

High priority

Some fixes available 3 of 4

NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of service and possible remote code execution as a result of deep copying a data structure and...

1 affected package

unbound

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
unbound Fixed Fixed Not affected Not affected Not affected
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