{"id":"CVE-2026-102253","title":"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-c…","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 infinite loop by sending a single crafted control-c…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-835"],"vendor":"esnet","product":"iperf3","affected":["iperf3 >= 3.14 < 3.22"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T21:17:13.640","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102253","references":[{"url":"https://github.com/esnet/iperf/blob/master/RELNOTES.md","label":"disclosure@vulncheck.com"},{"url":"https://github.com/esnet/iperf/releases/tag/3.22","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/iperf3-udp-receive-worker-infinite-loop-dos","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-29T20:46:06.617Z","slug":"CVE-2026-102253","body":"## Overview\n\niperf3 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}