---
id: CVE-2026-74685
title: |-
  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/ltc…
summary: |-
  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/ltc…
severity: none
published: '2026-08-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74685'
references:
  - url: 'https://git.kernel.org/stable/c/046e56b53c09375ef39903514496aa5508db9729'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/60e06c4dba696173982393252a40ceb7dd2eec18'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/de58b90a4d1417c15b693eb04c0ce6bc925d84c6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e253dd5f9f6d875a317895bf43ec9534ed7523cb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00209
epssPercentile: 0.10256
ingestedAt: '2026-10-14T13:30:58.537Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.