fkie_cve-2022-49749
Vulnerability from fkie_nvd
Published
2025-03-27 17:15
Modified
2025-10-01 18:15
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f29d780bd691d20e89e5b35d5e6568607115e94Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9f36aae9e80e79b7a6d62227eaa96935166be9fePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c8c37bc514514999e62a17e95160ed9ebf75ca8dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ed173f77fd28a3e4fffc13b3f28687b9eba61157Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.2
linux linux_kernel 6.2
linux linux_kernel 6.2
linux linux_kernel 6.2
linux linux_kernel 6.2


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  "descriptions": [
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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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: i2c: designware: usar la conversi\u00f3n de u64 en la multiplicaci\u00f3n 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 par\u00e1metros dados, incluido ic_clk. Por ejemplo, en nuestro caso pr\u00e1ctico, donde ic_clk es mayor que un mill\u00f3n, la multiplicaci\u00f3n de ic_clk * 4700 resultar\u00e1 en un desbordamiento de 32 bits. A\u00f1ada la conversi\u00f3n de u64 al c\u00e1lculo para evitar el desbordamiento de la multiplicaci\u00f3n y utilice la definici\u00f3n correspondiente para la divisi\u00f3n."
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  "id": "CVE-2022-49749",
  "lastModified": "2025-10-01T18:15:32.307",
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          "baseScore": 5.5,
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          "confidentialityImpact": "NONE",
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          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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