CVE-2025-30194

When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.9 version. A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version. We would like to thank Charles Howes for bringing this issue to our attention.

The following products are affected by CVE-2025-30194 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-30194.

URL	Resource
http://www.openwall.com/lists/oss-security/2025/04/29/1
https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html
https://www.vicarius.io/vsociety/posts/cve-2025-30194-detection-dnsdist-vulnerability
https://www.vicarius.io/vsociety/posts/cve-2025-30194-mitigate-dnsdist-vulnerability