CVE-2026-10846 Insufficient verification that responses belong to a query

NLnet Labs ldns 1.2.0 up to and including versions 1.9.0, when used in applications as stub resolver over UDP, lacks matching the query destination address and port with the response source address and port. Furthermore not the query ID, neither the question of the query is matched with that of t...

CVE-2026-33596 TCP backend stream ID overflow

A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend...

CVE-2020-25109

An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The number of DNS queries/responses set in a DNS header is not checked against the data present. This may lead to successful Denial-of-Service, and possibly Remote Code Execution...