{"id":"CVE-2026-97206","published":"2026-10-21T09:17:08.473","lastModified":"2026-10-22T15:22:40.700","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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-416"],"vendors":[],"products":[],"references":[{"url":"https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-97206.txt","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}