High severity7.5NVD Advisory· Published Sep 23, 2022· Updated Jun 17, 2026

CVE-2022-40188

Description

Knot Resolver before 5.5.3 allows remote attackers to cause a denial of service (CPU consumption) because of algorithmic complexity. During an attack, an authoritative server must return large NS sets or address sets.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Nic/Knot Resolver
cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*
Range: <5.5.3
Debian/linux
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Fedoraproject/Fedora3 versions
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
Knot Resolver/Knot Resolverdescription
Cz Nic/Knot Resolverllm-create
Range: <5.5.3

Patches

Vulnerability mechanics

References

gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1343nvdRelease NotesThird Party Advisory
lists.debian.org/debian-lts-announce/2022/10/msg00008.htmlnvdMailing ListThird Party Advisory
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIMDNIUI7GTUEKIBBYYW7OCTJQFPDNXL/nvd
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2VE5K3VDUHJOIA2IGT3G5R76IBADMNE/nvd
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XO6LIVQS62MI5GG4OVYB5RHVZMYNHAHG/nvd

News mentions

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cvss	0.488
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000