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Status published
Low
CVE-2025-30187
Denial of service via crafted DoH exchange in PowerDNS DNSdist
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
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Affected Vendor
PowerDNS
View all reports →Affected Software
DNSdist
Vulnerable Versions:
1.9.0, 2.0.0
Timeline
Official Publish:
September 18th, 2025
Last Modified:
November 4th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L