hwmon: (ltc4282) Clamp negative current limits

Answer in brief

CVE-2026-74685 records a Unknown severity vulnerability in hwmon: (ltc4282) Clamp negative current limits. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 22, 2026Updated Aug 22, 2026Source checked Aug 22, 2026First seen by HOL Aug 22, 2026Material review Aug 22, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <60e06c4dba696173982393252a40ceb7dd2eec18 \|\| >=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <de58b90a4d1417c15b693eb04c0ce6bc925d84c6 \|\| >=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <046e56b53c09375ef39903514496aa5508db9729 \|\| >=cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 <e253dd5f9f6d875a317895bf43ec9534ed7523cb	60e06c4dba696173982393252a40ceb7dd2eec18, de58b90a4d1417c15b693eb04c0ce6bc925d84c6, 046e56b53c09375ef39903514496aa5508db9729, e253dd5f9f6d875a317895bf43ec9534ed7523cb
Linux/Linuxgeneric	6.9	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 60e06c4dba696173982393252a40ceb7dd2eec18 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 22, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.