HIGH 7.5 NVD

CVE-2026-97206

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

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://www.nlnetlabs.nl/downloads/unbound/CVE-2026-97206.txt

Published: 2026-10-21 · Source: NVD · Feed updated: 2026-10-21

This high severity vulnerability with a CVSS score of 7.5 was published on 2026-10-21 via NVD.

vulnfeed aggregates 18720 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.