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CVE-2022-49749

Estado: ModificadaMedia (5.5)—

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

i2c: designware: use casting of u64 in clock multiplication to avoid overflow

In functions i2c_dw_scl_lcnt() and i2c_dw_scl_hcnt() may have overflow by depending on the values of the given parameters including the ic_clk. For example in our use case where ic_clk is larger than one million, multiplication of ic_clk * 4700 will result in 32 bit overflow.

Add cast of u64 to the calculation to avoid multiplication overflow, and use the corresponding define for divide.

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)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: designware: use casting of u64 in clock multiplication to avoid overflow\n\nIn functions i2c_dw_scl_lcnt() and i2c_dw_scl_hcnt() may have overflow\nby depending on the values of the given parameters including the ic_clk.\nFor example in our use case where ic_clk is larger than one million,\nmultiplication of ic_clk * 4700 will result in 32 bit overflow.\n\nAdd cast of u64 to the calculation to avoid multiplication overflow, and\nuse the corresponding define for divide."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: i2c: designware: usar la conversión de u64 en la multiplicación de reloj para evitar el desbordamiento. Las funciones i2c_dw_scl_lcnt() e i2c_dw_scl_hcnt() pueden experimentar un desbordamiento al depender de los valores de los parámetros dados, incluido ic_clk. Por ejemplo, en nuestro caso práctico, donde ic_clk es mayor que un millón, la multiplicación de ic_clk * 4700 resultará en un desbordamiento de 32 bits. Añada la conversión de u64 al cálculo para evitar el desbordamiento de la multiplicación y utilice la definición correspondiente para la división."
    }
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  "lastModified": "2026-06-17T05:19:02.413",
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