CVE-2025-30193

In some circumstances, when DNSdist is configured to allow an unlimited number of queries on a single, incoming TCP connection from a client, an attacker can cause a denial of service by crafting a TCP exchange that triggers an exhaustion of the stack and a crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.10 version. A workaround is to restrict the maximum number of queries on incoming TCP connections to a safe value, like 50, via the setMaxTCPQueriesPerConnection setting. We would like to thank Renaud Allard for bringing this issue to our attention.

The following products are affected by CVE-2025-30193 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-30193.

URL	Resource
https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-03.html