CVE-2022-49749

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  3. CVE-2022-49749

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n 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
Link Resource
https://git.kernel.org/stable/c/2f29d780bd691d20e89e5b35d5e6568607115e94 Patch
https://git.kernel.org/stable/c/9f36aae9e80e79b7a6d62227eaa96935166be9fe Patch
https://git.kernel.org/stable/c/c8c37bc514514999e62a17e95160ed9ebf75ca8d Patch
https://git.kernel.org/stable/c/ed173f77fd28a3e4fffc13b3f28687b9eba61157 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc5:*:*:*:*:*:*
History

14 Apr 2025, 20:27

Type Values Removed Values Added
Summary
  • (es) 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.
CWE CWE-190
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/2f29d780bd691d20e89e5b35d5e6568607115e94 - () https://git.kernel.org/stable/c/2f29d780bd691d20e89e5b35d5e6568607115e94 - Patch
References () https://git.kernel.org/stable/c/9f36aae9e80e79b7a6d62227eaa96935166be9fe - () https://git.kernel.org/stable/c/9f36aae9e80e79b7a6d62227eaa96935166be9fe - Patch
References () https://git.kernel.org/stable/c/c8c37bc514514999e62a17e95160ed9ebf75ca8d - () https://git.kernel.org/stable/c/c8c37bc514514999e62a17e95160ed9ebf75ca8d - Patch
References () https://git.kernel.org/stable/c/ed173f77fd28a3e4fffc13b3f28687b9eba61157 - () https://git.kernel.org/stable/c/ed173f77fd28a3e4fffc13b3f28687b9eba61157 - Patch
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:6.2:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*

27 Mar 2025, 17:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-03-27 17:15

Updated : 2025-10-01 18:15

NVD link : CVE-2022-49749

Mitre link : CVE-2022-49749

CVE.ORG link : CVE-2022-49749

JSON object : View

Products Affected

linux

CWE
CWE-190

Integer Overflow or Wraparound