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.
CVSS
No CVSS.
References
Configurations
No configuration.
History
No history.
Information
Published : 2026-08-22 16:16
Updated : 2026-08-22 16:16
NVD link : CVE-2026-74685
Mitre link : CVE-2026-74685
CVE.ORG link : CVE-2026-74685
JSON object : View
Products Affected
No product.
CWE
No CWE.