{"id":"CVE-2026-102253","published":"2026-09-29T21:17:13.640","lastModified":"2026-09-29T21:17:13.640","description":"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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-835"],"vendors":[],"products":[],"references":[{"url":"https://github.com/esnet/iperf/blob/master/RELNOTES.md","tags":[]},{"url":"https://github.com/esnet/iperf/releases/tag/3.22","tags":[]},{"url":"https://www.vulncheck.com/advisories/iperf3-udp-receive-worker-infinite-loop-dos","tags":[]}],"exploitRefs":[{"url":"https://github.com/esnet/iperf/blob/master/RELNOTES.md","tags":[]},{"url":"https://github.com/esnet/iperf/releases/tag/3.22","tags":[]}],"hasPoc":true,"ai":null}