Knot Resolver through 5.5.1 may allow DNS cache poisoning when there is an attempt to limit forwarding actions by filters.

published 2022-06-20 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-36049

cvss: 5.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

Patch / fix

links 1

github.com/CZ-NIC/knot-resolver@ccb9d97 commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-32983 updated 2025-11-21

knot-resolver: DNS cache poisoning

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-290 Authentication Bypass by Spoofing

References

github.com /CZ-NIC/knot-resolver/commit/ccb9d9794db5eb757c33becf65cb1cf48ecfd968
patch, third-party-advisory
knot-resolver.readthedocs.io /en/stable/modules-policy.html#forwarding
vendor-advisory

Sources

CVE List CVE-2022-32983
NVD CVE-2022-32983

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary