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CVE-2026-71217

Estado: Pendiente de análisisAlta (7.5)—

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 `parallel` and `len`, 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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:N/UI:N indica explotación remota sin privilegios (T1190). La descripción explícita de DoS por agotamiento de recursos (creación excesiva de streams/threads y asignaciones de buffer) corresponde a T1499.004 (application exhaustion).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

ES — Iperf3AI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-71217",
  "cveTags": [],
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-71217",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-11T16:11:03.827772Z"
        }
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    "cvssMetricV31": [
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        "source": "secalert@redhat.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
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  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
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          "cpes": [
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          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux 10",
          "versions": [
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          "cpes": [
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          "vendor": "Red Hat",
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  "published": "2026-08-11T09:17:14.057",
  "references": [
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:61257",
      "source": "secalert@redhat.com"
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    {
      "url": "https://access.redhat.com/errata/RHSA-2026:61389",
      "source": "secalert@redhat.com"
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      "url": "https://access.redhat.com/errata/RHSA-2026:61680",
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      "url": "https://access.redhat.com/security/cve/CVE-2026-71217",
      "source": "secalert@redhat.com"
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    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460984",
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      "url": "https://github.com/esnet/iperf/commit/494dd377eca4689672becdf06a85158557db1586",
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  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
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      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
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          "value": "CWE-20"
        }
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "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 `parallel` and `len`, 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."
    }
  ],
  "lastModified": "2026-08-31T16:19:10.490",
  "sourceIdentifier": "secalert@redhat.com"
}