DNS ANY Query Assertion Failure in Caching DNS Server
CVE-2025-59029 Published on December 9, 2025
Internal logic flaw in cache management can lead to a denial of service in PowerDNS Recursor
An attacker can trigger an assertion failure by requesting crafted DNS records, waiting for them to be inserted into the records cache, then send a query with qtype set to ANY.
Vulnerability Analysis
CVE-2025-59029 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.
Weakness Type
What is an assertion failure Vulnerability?
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
CVE-2025-59029 has been classified to as an assertion failure vulnerability or weakness.
Products Associated with CVE-2025-59029
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Affected Versions
PowerDNS Recursor:- Version 5.3.0 and below 5.3.2 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.