{
  "cveId": "CVE-2026-102253",
  "url": "https://patchblox.com/security/cve/CVE-2026-102253",
  "summary": "CVE-2026-102253 is fixed in 5 products on 1 platform, first by FEDORA-2026-AF72C5C990, released October 4, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "iperf3 \u003C 3.22 UDP Receive Worker Infinite Loop DoS",
  "description": "iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server\u0027s 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": "2026-09-29T20:11:47Z",
  "severity": "Important",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
  "epss": 0.00431,
  "epssPercentile": 0.3751,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102253",
  "fixes": [
    {
      "platform": "linux",
      "product": "iperf",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.21-160000.1.1",
      "fix": "OPENSUSE-SU-2026:22090-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22090-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "iperf",
      "release": "sles 15.7",
      "fixedVersion": "3.22-150000.3.18.1",
      "fix": "SUSE-SU-2026:4678-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4678-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "iperf",
      "release": "sles 16.0",
      "fixedVersion": "3.21-160000.1.1",
      "fix": "SUSE-SU-2026:24234-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24234-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "Debian 14",
      "fixedVersion": "3.22-0.1",
      "fix": "DEBIAN-CVE-2026-102253",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-102253",
      "released": "2026-10-05T21:42:17Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "Fedora 43",
      "fixedVersion": "3.22-2.fc43",
      "fix": "FEDORA-2026-AF72C5C990",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-af72c5c990",
      "released": "2026-10-04T20:20:14Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "RHEL 10",
      "fixedVersion": "3.17.1-6.el10_2.2",
      "fix": "RHSA-2026:88207",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-88207",
      "released": "2026-10-24T13:28:06Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "almalinux 10",
      "fixedVersion": "3.17.1-6.el10_2.2",
      "fix": "ALSA-2026:88207",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-88207",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "ol 10",
      "fixedVersion": "0:3.17.1-6.el10_2.2",
      "fix": "ELSA-2026-88207",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-88207",
      "released": "2026-11-07T00:59:15Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "rocky 10",
      "fixedVersion": "0:3.17.1-6.el10_2.2",
      "fix": "RLSA-2026:88207",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-88207",
      "released": "2026-11-07T00:39:51Z"
    },
    {
      "platform": "linux",
      "product": "iperf3-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "3.22-2.fc43",
      "fix": "FEDORA-2026-AF72C5C990",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-af72c5c990",
      "released": "2026-10-04T20:20:14Z"
    },
    {
      "platform": "linux",
      "product": "iperf3-debugsource",
      "release": "Fedora 43",
      "fixedVersion": "3.22-2.fc43",
      "fix": "FEDORA-2026-AF72C5C990",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-af72c5c990",
      "released": "2026-10-04T20:20:14Z"
    },
    {
      "platform": "linux",
      "product": "iperf3-devel",
      "release": "Fedora 43",
      "fixedVersion": "3.22-2.fc43",
      "fix": "FEDORA-2026-AF72C5C990",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-af72c5c990",
      "released": "2026-10-04T20:20:14Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}