dnsdist: When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by craf...
CVE-2025-30194 is fixed in dnsdist on 1 platform, first by DEBIAN-CVE-2025-30194, released April 29, 2025. It is not reported as exploited. Patch Radar priority: High.
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. The remedy is: upgrade to the patched 1.9.9 version. A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version. We would like to thank Charles Howes for bringing this issue to our attention.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| dnsdist · Debian 13.5 (trixie) | 1.9.9-1 | DEBIAN-CVE-2025-30194 | Apr 29, 2025 |
| dnsdist · Debian 14 | 1.9.9-1 | DEBIAN-CVE-2025-30194 | Apr 29, 2025 |
| dnsdist · sles 15.7 | 1.9.10-150700.3.3.1 | SUSE-SU-2025:01743-1 | May 29, 2025 |
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