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

hwmon: (ltc4282) Clamp negative current limits

When a negative value is passed to ltc4282_write_curr(), the signed long
val is cast directly to u64:

drivers/hwmon/ltc4282.c:ltc4282_write_curr() {
        /* need to pass it in millivolt */
        u32 in = DIV_ROUND_CLOSEST_ULL((u64)val * st->rsense, DECA * MICRO);
        ...
}

This cast converts negative inputs into large positive values. The
subsequent division result overflows the u32 in variable, truncating
to a pseudo-random positive value. When this is passed to
ltc4282_write_voltage_byte(), it is clamped to the maximum limit instead
of zero.

Clamp val to 0 and to the maximum supported upper limit before the cast
and assign the result to a 64-bit temporary variable before the division
to avoid the underflow and an also possible overflow.

https://git.kernel.org/stable/c/046e56b53c09375ef39903514496aa5508db9729

https://git.kernel.org/stable/c/60e06c4dba696173982393252a40ceb7dd2eec18

https://git.kernel.org/stable/c/de58b90a4d1417c15b693eb04c0ce6bc925d84c6

https://git.kernel.org/stable/c/e253dd5f9f6d875a317895bf43ec9534ed7523cb

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