CVE-2025-30187

LOW

DNSdist 1.9.0-1.9.10 and 2.0.0 - Denial of Service via nghttp2 DoH I/O Read Loop

Title source: llm

Description

In some circumstances, when DNSdist is configured to use the nghttp2 library to process incoming DNS over HTTPS queries, an attacker might be able to cause a denial of service by crafting a DoH exchange that triggers an unbounded I/O read loop, causing an unexpected consumption of CPU resources.

References (2)

Core 2

Core References

Various Sources

https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-05.html

Mailing List

http://www.openwall.com/lists/oss-security/2025/09/18/1

Scores

CVSS v3 3.7

EPSS 0.0027

EPSS Percentile 18.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-835

Status published

Products (2)

PowerDNS/DNSdist 1.9.0 - 1.9.11

PowerDNS/DNSdist 2.0.0 - 2.0.1

Published Sep 18, 2025

Tracked Since Feb 18, 2026