{"schema":"threatline.record/2","record":{"id":"CVE-2026-102253","aliases":[],"summary":"iperf3 < 3.22 UDP Receive Worker Infinite Loop DoS","details":"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.","categories":["Unclassified"],"product":"iperf3","vendor":"esnet","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-102253","source_modified_at":"2026-10-01T15:19:47.164Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"iperf3","vendor":"esnet","versions":[{"status":"affected","version":"3.14","versionType":"custom","lessThan":"3.22"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-102253","source_modified_at":"2026-10-01T15:19:47.164Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"iperf3","ecosystem":null},"version":"3.22","basis":"first unaffected version stated in the CVE record"}],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00431,"percentile":0.36255,"score_date":"2026-10-23"},"published_at":"2026-09-29T20:11:47.089Z","modified_at":"2026-10-01T15:19:47.164Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-102253","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-01T15:19:47.164Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-102253","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/esnet/iperf/releases/tag/3.22","tags":["vendor-advisory","patch"]},{"source":"CVE List","url":"https://github.com/esnet/iperf/blob/master/RELNOTES.md","tags":["release-notes"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/iperf3-udp-receive-worker-infinite-loop-dos","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-09-30T19:25:42.477583Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-01T15:19:47.164Z","content_hash":"454f66e4f91dbab131e4f0b56ecd441c52b8dbd26b4fc70730c36d62e5b40e23"}}