Packages
- dnsdist - A highly DNS-, DoS- and abuse-aware loadbalancer
Details
It was discovered that HTTP/2, which is used/vendored by DNSdist, did not
properly account for resources when handling client-triggered stream
resets. An attacker could possibly use this issue to cause a
denial of service. (CVE-2025-8671)
It was discovered that DNSdist did not properly manage memory limits when
handling an unlimited number of queries on a single TCP connection. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2025-30193)
It was discovered that DNSdist, when configured with the nghttp2 library,
did not correctly process certain DNS over HTTPS queries. An attacker
could possibly use this cause a denial of service. (CVE-2025-30187)
It was discovered that HTTP/2, which is used/vendored by DNSdist, did not
properly account for resources when handling client-triggered stream
resets. An attacker could possibly use this issue to cause a
denial of service. (CVE-2025-8671)
It was discovered that DNSdist did not properly manage memory limits when
handling an unlimited number of queries on a single TCP connection. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2025-30193)
It was discovered that DNSdist, when configured with the nghttp2 library,
did not correctly process certain DNS over HTTPS queries. An attacker
could possibly use this cause a denial of service. (CVE-2025-30187)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 25.10 questing | dnsdist – 1.9.10-1ubuntu0.1 | ||
| 24.04 LTS noble | dnsdist – 1.8.3-2ubuntu0.1~esm1 | ||
| 22.04 LTS jammy | dnsdist – 1.6.1-1ubuntu0.1~esm2 | ||
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