Use After Free in Powerdns Dnsdist

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…

Vulnerability class: Use-After-Free

EPSS: 0.003 (49.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-30194?
CVE-2025-30194 is a high-severity vulnerability in Powerdns Dnsdist, classified under Use After Free. CVSS score: 7.5/10. Published 2025-04-29.
How severe is CVE-2025-30194?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-30194 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.