dnsdist: In some circumstances, when DNSdist is configured to use the nghttp2 library to process incoming DNS over HTTPS queri...
CVE-2025-30187 is fixed in dnsdist on 1 platform, first by dnsdist 1.9.10-1ubuntu0.1, released September 18, 2025. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| dnsdist · Debian 13.5 (trixie) | 1.9.10-1+deb13u1 | DEBIAN-CVE-2025-30187 | Sep 18, 2025 |
| dnsdist · Debian 14 | 2.0.1-1 | DEBIAN-CVE-2025-30187 | Sep 18, 2025 |
| dnsdist · Ubuntu 25.10 (questing) | 1.9.10-1ubuntu0.1 | dnsdist 1.9.10-1ubuntu0.1 | Sep 18, 2025 |
| dnsdist · opensuse-leap 16.0 | 1.9.11-160000.1.1 | OPENSUSE-SU-2026:20461-1 | Apr 2, 2026 |
| dnsdist · sles 15.7 | 1.9.11-150700.3.6.1 | SUSE-SU-2026:0888-1 | Mar 13, 2026 |
| dnsdist · sles 16.0 | 1.9.11-160000.1.1 | SUSE-SU-2026:20995-1 | Apr 2, 2026 |
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