{"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":"2026-09-30","sourceUpdated":"2026-09-30T20:17:21.840","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"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102253.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-102253"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543638"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-102253"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102253"}],"tags":["nvd","cve.org","csaf","vex","red-hat","exploit-available"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-30T19:25:42.477583Z"},"epss":0.00431,"epssPercentile":0.37112,"ingestedAt":"2026-09-29T20:46:06.617Z","exploits":{"github":1,"githubRepos":["https://github.com/Ravi-lk/CVE-2026-102253-POC"],"checkedAt":"2026-10-27T16:53:21.676Z"},"exploitAvailable":true,"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.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-01 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102253.json)","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":217936,"id":"CVE-2026-102253","ts":1791452330905,"field":"exploit_available","old":"false","new":"true"}]}