CVE-2026-33610
Received Received - Intake
File Descriptor Exhaustion in PowerDNS Secondary Causes DoS

Publication date: 2026-04-22

Last updated on: 2026-04-24

Assigner: Open-Xchange

Description
A rogue primary server may cause file descriptor exhaustion and eventually a denial of service, when a PowerDNS secondary server forwards a DNS update request to it.
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Meta Information
Published
2026-04-22
Last Modified
2026-04-24
Generated
2026-06-16
AI Q&A
2026-04-22
EPSS Evaluated
2026-06-15
NVD
CVE-2026-33610
EUVD
EUVD-2026-24949
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
powerdns authoritative From 4.9.0 (inc) to 4.9.14 (exc)
powerdns authoritative From 5.0.0 (inc) to 5.0.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.
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Executive Summary

This vulnerability occurs when a rogue primary server causes file descriptor exhaustion on a PowerDNS secondary server. This happens because the secondary server forwards a DNS update request to the rogue primary server, which leads to resource exhaustion.

Impact Analysis

The impact of this vulnerability is a denial of service (DoS) condition. The exhaustion of file descriptors on the PowerDNS secondary server can prevent it from functioning properly, potentially disrupting DNS services.

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