{"schema":"threatline.record/2","record":{"id":"CVE-2026-97206","aliases":[],"summary":"DNS-over-QUIC (DoQ) path-migration can lead to use-after-free on multi-threaded deployments.","details":"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.","categories":["Unclassified"],"product":"Unbound","vendor":"NLnet Labs","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97206","source_modified_at":"2026-10-21T08:57:41.106Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Unbound","vendor":"NLnet Labs","versions":[{"version":"1.22.0","status":"affected","lessThan":"1.26.2","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97206","source_modified_at":"2026-10-21T08:57:41.106Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Unbound","ecosystem":null},"version":"1.26.2","basis":"first unaffected version stated in the CVE record"}],"cvss":7.5,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00263,"percentile":0.17135,"score_date":"2026-10-23"},"published_at":"2026-10-21T08:57:41.106Z","modified_at":"2026-10-21T08:57:41.106Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-97206","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-21T08:57:41.106Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-97206","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-97206.txt","tags":["vendor-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-21T08:57:41.106Z","content_hash":"5591a812f0fddac719b4212d2f8478ded3dd7c5bda9bd80cb8bc30f4e4186593"}}