{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "926bd905501b792bd082d2200d1d1a84aa543e3a"
            }
          ],
          "repo": "https://github.com/esnet/iperf",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-835"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102253.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "3.14"
          },
          {
            "fixed": "3.22"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "3.14"
          },
          {
            "fixed": "3.22"
          }
        ],
        "source": "CPE_FIELD"
      }
    ]
  },
  "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.",
  "id": "CVE-2026-102253",
  "modified": "2026-10-02T03:31:08.019670272Z",
  "published": "2026-09-29T20:11:47.089Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102253.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/esnet/iperf/blob/master/RELNOTES.md"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-102253"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/iperf3-udp-receive-worker-infinite-loop-dos"
    },
    {
      "type": "FIX",
      "url": "https://github.com/esnet/iperf/releases/tag/3.22"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/esnet/iperf"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "iperf3 \u003c 3.22 UDP Receive Worker Infinite Loop DoS"
}