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CVE-2023-4130

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()

There are multiple smb2_ea_info buffers in FILE_FULL_EA_INFORMATION request from client. ksmbd find next smb2_ea_info using ->NextEntryOffset of current smb2_ea_info. ksmbd need to validate buffer length Before accessing the next ea. ksmbd should check buffer length using buf_len, not next variable. next is the start offset of current ea that got from previous ea.

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).

Tecnologías afectadas (1)

CWE

Referencias

JSON original (NVD)

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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
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  "published": "2025-08-16T14:15:27.640",
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()\n\nThere are multiple smb2_ea_info buffers in FILE_FULL_EA_INFORMATION request\nfrom client. ksmbd find next smb2_ea_info using ->NextEntryOffset of\ncurrent smb2_ea_info. ksmbd need to validate buffer length Before\naccessing the next ea. ksmbd should check buffer length using buf_len,\nnot next variable. next is the start offset of current ea that got from\nprevious ea."
    },
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: corrige la siguiente validación de longitud incorrecta del búfer ea en smb2_set_ea() Hay múltiples búferes smb2_ea_info en la solicitud FILE_FULL_EA_INFORMATION del cliente. ksmbd encuentra el siguiente smb2_ea_info usando ->NextEntryOffset del smb2_ea_info actual. ksmbd necesita validar la longitud del búfer antes de acceder al siguiente ea. ksmbd debe verificar la longitud del búfer usando buf_len, no la variable next. next es el desplazamiento de inicio del ea actual que se obtuvo del ea anterior."
    }
  ],
  "lastModified": "2026-08-15T13:17:39.713",
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