{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102253","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-09-28T19:17:36.656Z","datePublished":"2026-09-29T20:11:47.089Z","dateUpdated":"2026-10-01T15:19:47.164Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-10-01T15:19:47.164Z"},"title":"iperf3 < 3.22 UDP Receive Worker Infinite Loop DoS","descriptions":[{"lang":"en","value":"iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server's UDP receive worker into an unrecoverable infinite loop by sending a single crafted control-channel parameter message followed by one 16-byte UDP datagram. Attackers can permanently pin the affected per-stream receive thread at approximately 100% CPU usage, rendering the server unusable until forcibly killed with SIGKILL, as the process does not respond to normal control-channel closure."}],"tags":["x_open-source"],"datePublic":"2026-09-29T00:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-835","description":"Loop with Unreachable Exit Condition ('Infinite Loop')","type":"CWE"}]}],"affected":[{"defaultStatus":"unaffected","vendor":"esnet","product":"iperf3","packageURL":"pkg:github/esnet/iperf","repo":"https://github.com/esnet/iperf","versions":[{"status":"affected","version":"3.14","versionType":"custom","lessThan":"3.22"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:es:iperf3:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"3.22"}]}]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.7,"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"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","version":"3.1","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}}],"references":[{"url":"https://github.com/esnet/iperf/releases/tag/3.22","name":"Vendor Patch","tags":["vendor-advisory","patch"]},{"url":"https://github.com/esnet/iperf/blob/master/RELNOTES.md","name":"Vendor Release Notes","tags":["release-notes"]},{"url":"https://www.vulncheck.com/advisories/iperf3-udp-receive-worker-infinite-loop-dos","name":"VulnCheck Advisory","tags":["third-party-advisory"]}],"credits":[{"lang":"en","value":"Ravindu Lakmina Munaweera","type":"finder"},{"lang":"en","value":"VulnCheck","type":"coordinator"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"vulncheck"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T19:25:42.477583Z","id":"CVE-2026-102253","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":"2026-09-30T19:25:56.306Z"}}]}}