Description
A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.
Published: 2026-04-22
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Apply Patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6235-1 dnsdist security update
History

Fri, 24 Apr 2026 19:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*

Wed, 22 Apr 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Powerdns
Powerdns dnsdist
Vendors & Products Powerdns
Powerdns dnsdist

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

Type Values Removed Values Added
Weaknesses CWE-122
Metrics ssvc

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


Wed, 22 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Description A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.
Title Off-by-one access when processing crafted UDP responses
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H'}


Subscriptions

Powerdns Dnsdist
cve-icon MITRE

Status: PUBLISHED

Assigner: OX

Published:

Updated: 2026-04-22T14:47:07.785Z

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

Link: CVE-2026-33602

cve-icon Vulnrichment

Updated: 2026-04-22T14:45:48.657Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-22T14:16:54.537

Modified: 2026-04-24T18:52:25.453

Link: CVE-2026-33602

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-22T19:30:24Z

Weaknesses