3.7

CVE-2025-30187: powerdns dnsdist Infinite Loop

CVSS: 3.7v3.1LowDeferred
AliasesUBUNTU-CVE-2025-30187DEBIAN-CVE-2025-30187
Published 18-09-2025Last modified 04-11-2025
Open JSON

Vulnerability summary

CVE-2025-30187 is a low (CVSS 3.7) Infinite Loop vulnerability in powerdns dnsdist. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20% of scored vulnerabilities.

Overall risk
15/100
0100
Low · default modelHow is this calculated?
CVSS score
3.7/10
010
Low · v3.1 (CVE.org)
EPSS score
0.29%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
OPENSUSE-SU-2026:20461-1SUSE-SU-2026:0888-1SUSE-SU-2026:20995-1USN-8037-1

Timeline

  1. 18-09-2025
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

0.00 pp

From 0.29% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • dnsdist< 1.9.10-1+deb13u1 | < 2.0.1-1
Powerdns1 product
  • dnsdist≥ 1.9.0, < 1.9.11 | ≥ 2.0.0, < 2.0.1
Ubuntu1 product
  • dnsdist< 1.9.10-1ubuntu0.1

3 vendors · 3 products

References

7 links