Description
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.
Published: 2026-04-22
Score: 4.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Apply patch
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6234-1 pdns-recursor security update
History

Mon, 27 Apr 2026 17:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
cpe:2.3:a:powerdns:recursor:5.4.0:*:*:*:*:*:*:*

Wed, 22 Apr 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 22 Apr 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared Powerdns
Powerdns recursor
Weaknesses CWE-476
Vendors & Products Powerdns
Powerdns recursor

Wed, 22 Apr 2026 10:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Insufficient validation of zonemd record
References
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Powerdns Recursor
cve-icon MITRE

Status: PUBLISHED

Assigner: OX

Published:

Updated: 2026-04-22T18:10:44.494Z

Reserved: 2026-03-23T12:57:56.815Z

Link: CVE-2026-33601

cve-icon Vulnrichment

Updated: 2026-04-22T18:00:19.125Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-22T10:16:52.223

Modified: 2026-04-27T16:58:57.087

Link: CVE-2026-33601

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-22T11:30:15Z

Weaknesses