Assertion Failure Vulnerability in PowerDNS Recursor

CVE-2025-59029

What is CVE-2025-59029?

An assertion failure vulnerability exists in PowerDNS Recursor that can be exploited by attackers to disrupt service. By crafting specific DNS records and subsequently sending a subsequent query with the qtype set to ANY, an attacker can manipulate the records cache, leading to potential service interruptions. This vulnerability highlights the importance of securing DNS services against deliberate exploitation.

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