{"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"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-12245", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-25T12:42:22.635356Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-25T12:42:36.299Z"}}], "cna": {"title": "Denial of DNS over TLS service by any DoT client", "credits": [{"lang": "en", "type": "finder", "value": "Qifan Zhang from Palo Alto Networks"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "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"}, "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"}]}], "affected": [{"vendor": "NLnet Labs", "product": "NSD", "versions": [{"status": "affected", "version": "4.13.0", "lessThan": "4.14.3", "versionType": "semver"}], "defaultStatus": "unaffected"}], "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"}], "solutions": [{"lang": "en", "value": "This issue is fixed starting with version 4.14.3."}], "datePublic": "2026-06-25T00:00:00.000Z", "references": [{"url": "https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12245.txt", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "cvelib 1.8.0"}, "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416: Use After Free"}]}], "providerMetadata": {"orgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6", "shortName": "NLnet Labs", "dateUpdated": "2026-06-25T05:24:18.620Z"}}}, "cveMetadata": {"cveId": "CVE-2026-12245", "state": "PUBLISHED", "dateUpdated": "2026-06-25T12:42:50.104Z", "dateReserved": "2026-06-15T06:47:18.496Z", "assignerOrgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6", "datePublished": "2026-06-25T05:24:18.620Z", "assignerShortName": "NLnet Labs"}, "dataVersion": "5.2"}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.13.0,4.14.3)"}}], "enrichment": {"confidence": 96.0, "confidence_source": "matching", "scores": [{"score": 96.0, "source": "matching"}]}, "original": {"product": "NSD", "source": "cna", "vendor": "NLnet Labs"}, "product": "nsd", "vendor": "nlnetlabs"}], "created": "2026-06-25T07:30:17.062993+00:00", "updated": "2026-06-25T13:15:03.613521+00:00", "vendors": ["nlnetlabs", "nlnetlabs$PRODUCT$nsd"]}