{
  "cveId": "CVE-2026-71217",
  "url": "https://patchblox.com/security/cve/CVE-2026-71217",
  "summary": "CVE-2026-71217 is fixed in 5 products on 1 platform, first by DEBIAN-CVE-2026-71217, released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Iperf3: iperf3 server accepts unbounded peer-controlled json parameters enabling remote denial of service via resource exhaustion",
  "description": "A flaw was found in iperf3. A remote attacker can exploit this vulnerability by sending crafted control-channel JSON with oversized numeric parameters, such as \u0060parallel\u0060 and \u0060len\u0060, which are not properly validated by the server. This improper input validation can lead to excessive stream and thread creation, as well as large buffer allocations, causing resource exhaustion. Consequently, this can result in a Denial of Service (DoS) on the affected iperf3 server.",
  "published": "2026-08-11T08:13:48Z",
  "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": "Improper Input Validation",
  "epss": 0.00635,
  "epssPercentile": 0.50702,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71217",
  "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-2026-71217",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-71217",
      "released": "2026-08-11T09:17:14Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "RHEL 10",
      "fixedVersion": "3.17.1-6.el10_2.1",
      "fix": "RHSA-2026:61680",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-61680",
      "released": "2026-09-02T01:28:12Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "RHEL 8",
      "fixedVersion": "0:3.5-12.el8_10.1",
      "fix": "RHSA-2026:61257",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-61257",
      "released": "2026-09-13T12:46:35Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "RHEL 9",
      "fixedVersion": "0:3.9-17.el9_8.1",
      "fix": "RHSA-2026:61389",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-61389",
      "released": "2026-09-13T12:47:53Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "almalinux 10",
      "fixedVersion": "3.17.1-6.el10_2.1",
      "fix": "ALSA-2026:61680",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-61680",
      "released": "2026-08-31T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "almalinux 8",
      "fixedVersion": "3.5-12.el8_10.1",
      "fix": "ALSA-2026:61257",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-61257",
      "released": "2026-08-31T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "almalinux 9",
      "fixedVersion": "3.9-17.el9_8.1",
      "fix": "ALSA-2026:61389",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-61389",
      "released": "2026-08-31T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "amzn 2023",
      "fixedVersion": "3.19.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-2070",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2070",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "ol 10",
      "fixedVersion": "0:3.17.1-6.el10_2.1",
      "fix": "ELSA-2026-61680-0",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-61680-0",
      "released": "2026-09-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "ol 8",
      "fixedVersion": "0:3.5-12.el8_10.1",
      "fix": "ELSA-2026-61257-0",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-61257-0",
      "released": "2026-09-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "ol 9",
      "fixedVersion": "0:3.9-17.el9_8.1",
      "fix": "ELSA-2026-61389-0",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-61389-0",
      "released": "2026-09-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "rocky 10",
      "fixedVersion": "0:3.17.1-6.el10_2.1",
      "fix": "RLSA-2026:61680",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-61680",
      "released": "2026-09-01T12:09:07Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "rocky 8",
      "fixedVersion": "0:3.5-12.el8_10.1",
      "fix": "RLSA-2026:61257",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-61257",
      "released": "2026-08-31T12:01:50Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "rocky 9",
      "fixedVersion": "0:3.9-17.el9_8.1",
      "fix": "RLSA-2026:61389",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-61389",
      "released": "2026-09-01T06:05:08Z"
    },
    {
      "platform": "linux",
      "product": "iperf3-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.19.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-2070",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2070",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iperf3-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "3.19.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-2070",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2070",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "iperf3-devel",
      "release": "amzn 2023",
      "fixedVersion": "3.19.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-2070",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2070",
      "released": "2026-08-31T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}