CVE-2025-59030 Insufficient validation of incoming notifies over TCP can lead to a denial of service in Recursor
An attacker can cause a denial of service in PowerDNS Recursor by sending malicious TCP NOTIFY queries to remove cached records.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-59030?
CVE-2025-59030 is a high-severity denial of service vulnerability in Powerdns Recursor, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An attacker can trigger the removal of cached records by sending a NOTIFY query over TCP.
Weakness: CWE-276
Which versions are affected by CVE-2025-59030?
It affects 1 product.
Products include Powerdns Recursor.
How do I fix CVE-2025-59030?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-59030 being exploited?
There is no known exploitation of CVE-2025-59030 in the wild and no public exploit code.
Other vulnerabilities in Powerdns Recursor
Sources
Also known as DEBIAN-CVE-2025-59030, DSA-6077-1, GHSA-646x-553g-6v9h, UBUNTU-CVE-2025-59030.