K000162871: PowerDNS DNSdist vulnerability CVE-2026-40211

Security Advisory Description An attacker can send crafted DNS over HTTP/3 queries, triggering an exception that prevents some buffer from being freed right away. The buffer will be freed at the end of the QUIC connection, but on some setups it might be possible to open enough concurrent DoH3...

GHSA-QHMP-Q7XH-99RH CoreDNS has TSIG authentication bypass on DoT, DoH, DoH3, DoQ, and gRPC

Summary CoreDNS' tsig plugin can be bypassed on non-plain-DNS transports because it trusts the transport writer's TsigStatus instead of performing verification itself. In the attached PoC, plain DNS/TCP correctly rejects an invalid TSIG NOTAUTH, while the same invalid-TSIG request is accepted ove...

CVE-2026-24030 Unbounded memory allocation for DoQ and DoH3

An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly...

CVE-2026-24030

DNSdist (DNS load balancer) has a vulnerability CVE-2026-24030 where processing DNS over QUIC or DNS over HTTP/3 payloads may allocate unbounded memory, potentially causing denial of service and, in some cases, an out-of-memory state. Debian’s advisory notes a fix in dnsdist for stable (trixie) v...

Google Adds Support for DNS-over-HTTP/3 in Android to Keep DNS Queries Private — The Hacker News

Google on Tuesday officially announced support for DNS-over-HTTP/3 DoH3 for Android devices as part of a Google Play system update designed to keep DNS queries private. To that end, Android smartphones running Android 11 and higher are expected to use DoH3 instead of DNS-over-TLS DoT, which was...