{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-12245","assignerOrgId":"206fc3a0-e175-490b-9eaa-a5738056c9f6","state":"PUBLISHED","assignerShortName":"NLnet Labs","dateReserved":"2026-06-15T06:47:18.496Z","datePublished":"2026-06-25T05:24:18.620Z","dateUpdated":"2026-06-25T12:42:50.104Z"},"containers":{"cna":{"title":"Denial of DNS over TLS service by any DoT client","references":[{"tags":["vendor-advisory"],"url":"https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12245.txt"}],"solutions":[{"lang":"en","value":"This issue is fixed starting with version 4.14.3."}],"affected":[{"defaultStatus":"unaffected","product":"NSD","vendor":"NLnet Labs","versions":[{"version":"4.13.0","lessThan":"4.14.3","status":"affected","versionType":"semver"}]}],"credits":[{"lang":"en","type":"finder","value":"Qifan Zhang from Palo Alto Networks"}],"timeline":[{"lang":"en","time":"2026-05-28T00:00:00.000Z","value":"Issue reported by Qifan Zhang"},{"lang":"en","time":"2026-06-12T00:00:00.000Z","value":"NLnet Labs shares patch"},{"lang":"en","time":"2026-06-15T00:00:00.000Z","value":"Qifan Zhang verifies patch"},{"lang":"en","time":"2026-06-25T00:00:00.000Z","value":"Fix released with version 4.14.3"}],"datePublic":"2026-06-25T00:00:00.000Z","descriptions":[{"lang":"en","value":"NSD from version 4.13.0 has a heap use-after-free bug in logging errors on TLS connections, causing a crash of the server process, which can be triggered trivially by sending a DNS query over a DoT connection, and closing the connection without reading the response."}],"metrics":[{"scenarios":[{"lang":"en","value":"Any client with access to the DoT port (853) can keep all iserve children in a crash-restart loop denying DoT service"}],"cvssV4_0":{"baseScore":8.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","description":"CWE-416: Use After Free","lang":"en","type":"CWE"}]}],"x_generator":{"engine":"cvelib 1.8.0"},"providerMetadata":{"orgId":"206fc3a0-e175-490b-9eaa-a5738056c9f6","shortName":"NLnet Labs","dateUpdated":"2026-06-25T05:24:18.620Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-25T12:42:22.635356Z","id":"CVE-2026-12245","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-25T12:42:50.104Z"}}]}}