CVE-2026-33601

EUVD-2026-24733
If you use the zoneToCache function with a malicious authoritative server, an attacker can send a zone that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.4 MEDIUM
NETWORK
HIGH
HIGH
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 41.74%
Affected Products (NVD)
VendorProductVersion
powerdnsrecursor
5.2.0 ≤
𝑥
< 5.2.9
powerdnsrecursor
5.3.0 ≤
𝑥
< 5.3.6
powerdnsrecursor
5.4.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
pdns-recursor
bookworm
vulnerable
bookworm (security)
vulnerable
forky
5.4.5-1
fixed
sid
5.4.6-1
fixed
trixie
5.2.11-0+deb13u1
fixed
trixie (security)
5.2.13-0+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
pdns-recursor
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
needs-triage
Common Weakness Enumeration
References
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html