{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18916", "assignerOrgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6", "state": "PUBLISHED", "assignerShortName": "NLnet Labs", "dateReserved": "2026-08-05T07:36:55.457Z", "datePublished": "2026-08-26T08:39:12.258Z", "dateUpdated": "2026-08-26T08:39:12.258Z"}, "containers": {"cna": {"title": "Remote TCP DoS by throttling the TCP receive window", "references": [{"url": "https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-18916.txt", "tags": ["vendor-advisory"]}], "solutions": [{"lang": "en", "value": "This issue is fixed in 4.15.1 and all later versions."}], "affected": [{"vendor": "NLnet Labs", "product": "NSD", "defaultStatus": "unaffected", "versions": [{"version": "3.2.11", "status": "affected", "lessThan": "4.15.1", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Akhil Koul (https://github.com/akoul)"}], "timeline": [{"time": "2026-08-01T00:02:43.000Z", "lang": "en", "value": "Issue reported by Akhil Koul"}, {"time": "2026-08-05T07:39:41.000Z", "lang": "en", "value": "NLnet Labs shares patch"}, {"time": "2026-08-05T14:18:42.000Z", "lang": "en", "value": "Akhil Koul verifies patch"}, {"time": "2026-08-26T12:00:00.000Z", "lang": "en", "value": "Fix released with version 4.15.1"}], "datePublic": "2026-08-26T12:00:00.000Z", "descriptions": [{"lang": "en", "value": "Any remote client can crash a NSD serve child, by throttling the TCP receive window after a TCP query. By continuously crashing the serve childs, the remote client can denial all TCP service to this NSD instance."}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "Remote client denying TCP availability by throttling the TCP receive window (down to 1 byte)"}], "cvssV4_0": {"version": "4.0", "baseScore": 6.9, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-191", "description": "CWE-191: Integer Underflow", "type": "CWE"}]}], "providerMetadata": {"orgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6", "shortName": "NLnet Labs", "dateUpdated": "2026-08-26T08:39:12.258Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

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{"created": "2026-08-26T09:30:04.078884+00:00", "updated": "2026-08-26T09:30:04.078904+00:00", "vendors": []}