Detections
Analytics
CVE-2026-97206
high
Description
NLnet Labs Unbound, 1.22.0 up to and including version 1.26.1, contains a DNS-over-QUIC (DoQ) lifetime bug reachable by a remote DoQ client under multi-threaded operation. A client-triggered QUIC path migration can enter stream/connection cleanup while a mesh reply still retains a pointer to the DoQ stream. Cleanup frees the DoQ stream and when the pending mesh reply later completes it dereferences a stale pointer leading to a crash.
References
https://github.com/suominen/CVE-2026-97206
https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-97206.txt