{"identifier":"CVE-2026-97206","cve":{"id":"CVE-2026-97206","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.","published":"2026-10-21T09:17:08.473000+00:00","modified":"2026-10-29T19:17:29.807000+00:00","status":"Awaiting Analysis","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_version":"3.1","affected":[],"weaknesses":["CWE-416"],"references":[{"url":"https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-97206.txt","source":"sep@nlnetlabs.nl"}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"sep@nlnetlabs.nl","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-29T19:08:11.587798Z","id":"CVE-2026-97206","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[],"source":"nvd","retrieved_at":"2026-10-29T22:09:19.869661+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00334,"percentile":0.2668,"date":"2026-10-29","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"www.nlnetlabs.nl","source_url":"https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-97206.txt","investigate_url":"https://investigate.aeglixmind.com/#www.nlnetlabs.nl"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-97206","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-97206","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-97206","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}