{"id":"CVE-2026-102253","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-102253","summary":"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…","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.","published":"2026-09-29T21:17:13.640","modified":"2026-09-30T20:17:21.840","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/esnet/iperf/blob/master/RELNOTES.md"},{"type":"WEB","url":"https://github.com/esnet/iperf/releases/tag/3.22"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/iperf3-udp-receive-worker-infinite-loop-dos"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-30T20:17:21.840"}}