CVE-2025-9408

Estado: AplazadaAlta (8.1)—

System call entry on Cortex M (and possibly R and A, but I think not) has a race which allows very practical privilege escalation for malicious userspace processes.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Puntuación base: 8.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.11%
Percentil entre todas las CVEs puntuadas: 1
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation95 %
Impacto principalT1059 Command and Scripting Interpreterexecution85 %

Acceso local (AV:L) sin interacción de usuario (UI:N) en system call entry permite escalada de privilegios; race condition en entrada de syscall explota procesos userspace maliciosos para ejecutar código con privilegios elevados.

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

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

CWE

CWE-270

Referencias

https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-5mp3-75wr

JSON original (NVD)

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  "id": "CVE-2025-9408",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-9408",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-11-12T14:54:05.961433Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "vulnerabilities@zephyrproject.org",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 1.4
      }
    ]
  },
  "affected": [
    {
      "source": "vulnerabilities@zephyrproject.org",
      "affectedData": [
        {
          "repo": "https://github.com/zephyrproject-rtos/zephyr",
          "vendor": "zephyrproject-rtos",
          "product": "Zephyr",
          "versions": [
            {
              "status": "affected",
              "version": "*",
              "versionType": "git",
              "lessThanOrEqual": "4.2"
            }
          ],
          "packageName": "Zephyr",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2025-11-11T16:15:40.917",
  "references": [
    {
      "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-5mp3-75wr",
      "source": "vulnerabilities@zephyrproject.org"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
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      "description": [
        {
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      "lang": "en",
      "value": "System call entry on Cortex M (and possibly R and A, but I think not) has a race which allows very practical privilege escalation for malicious userspace processes."
    }
  ],
  "lastModified": "2026-06-17T10:08:54.753",
  "sourceIdentifier": "vulnerabilities@zephyrproject.org"
}