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CVE-2022-50156

Estado: ModificadaAlta (7.8)—

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

HID: cp2112: prevent a buffer overflow in cp2112_xfer()

Smatch warnings: drivers/hid/hid-cp2112.c:793 cp2112_xfer() error: __memcpy() 'data->block[1]' too small (33 vs 255) drivers/hid/hid-cp2112.c:793 cp2112_xfer() error: __memcpy() 'buf' too small (64 vs 255)

The 'read_length' variable is provided by 'data->block[0]' which comes from user and it(read_length) can take a value between 0-255. Add an upper bound to 'read_length' variable to prevent a buffer overflow in memcpy().

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:L, PR:L sin UI permite escalada local; CWE-787 (buffer overflow) en cp2112_xfer() da ejecución de código con privilegios elevados (C:H, I:H, A:H).

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 PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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          "value": "CWE-787"
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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: cp2112: prevent a buffer overflow in cp2112_xfer()\n\nSmatch warnings:\ndrivers/hid/hid-cp2112.c:793 cp2112_xfer() error: __memcpy()\n'data->block[1]' too small (33 vs 255)\ndrivers/hid/hid-cp2112.c:793 cp2112_xfer() error: __memcpy() 'buf' too\nsmall (64 vs 255)\n\nThe 'read_length' variable is provided by 'data->block[0]' which comes\nfrom user and it(read_length) can take a value between 0-255. Add an\nupper bound to 'read_length' variable to prevent a buffer overflow in\nmemcpy()."
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: HID: cp2112: evitar un desbordamiento de búfer en cp2112_xfer() Advertencias de Smatch: drivers/hid/hid-cp2112.c:793 Error de cp2112_xfer(): __memcpy() 'data->block[1]' demasiado pequeño (33 frente a 255) drivers/hid/hid-cp2112.c:793 Error de cp2112_xfer(): __memcpy() 'buf' demasiado pequeño (64 frente a 255) La variable 'read_length' la proporciona 'data->block[0]', que proviene del usuario, y puede tomar un valor entre 0 y 255. Añada un límite superior a la variable 'read_length' para evitar un desbordamiento de búfer en memcpy()."
    }
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  "lastModified": "2026-08-04T10:18:06.150",
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