Answer in brief
CVE-2025-71111 records a Unknown severity vulnerability in hwmon: (w83791d) Convert macros to functions to avoid TOCTOU. 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.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9873964d6eb24bd0205394f9b791de9eddbcb855 <3dceb68f6ad33156032ef4da21a93d84059cca6d || >=9873964d6eb24bd0205394f9b791de9eddbcb855 <bf5b03227f2e6d4360004886d268f9df8993ef8f || >=9873964d6eb24bd0205394f9b791de9eddbcb855 <f2b579a0c37c0df19603d719894a942a295f634a || >=9873964d6eb24bd0205394f9b791de9eddbcb855 <f94800fbc26ccf7c81eb791707b038a57aa39a18 || >=9873964d6eb24bd0205394f9b791de9eddbcb855 <a9fb6e8835a22f5796c1182ed612daed3fd273af || >=9873964d6eb24bd0205394f9b791de9eddbcb855 <c8cf0c2bdcccc6634b6915ff793b844e12436680 || >=9873964d6eb24bd0205394f9b791de9eddbcb855 <670d7ef945d3a84683594429aea6ab2cdfa5ceb4 | 3dceb68f6ad33156032ef4da21a93d84059cca6d, bf5b03227f2e6d4360004886d268f9df8993ef8f, f2b579a0c37c0df19603d719894a942a295f634a, f94800fbc26ccf7c81eb791707b038a57aa39a18, a9fb6e8835a22f5796c1182ed612daed3fd273af, c8cf0c2bdcccc6634b6915ff793b844e12436680, 670d7ef945d3a84683594429aea6ab2cdfa5ceb4 |
| Linux/Linuxgeneric | 2.6.18 | Not reported |
Published upstream
Jan 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 19, 2026
In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83791d) Convert macros to functions to avoid TOCTOU The macro FAN_FROM_REG evaluates its arguments multiple times. When used in lockless contexts involving shared driver data, this leads to Time-of-Check to Time-of-Use (TOCTOU) race conditions, potentially causing divide-by-zero errors. Convert the macro to a static function. This guarantees that arguments are evaluated only once (pass-by-value), preventing the race conditions. Additionally, in store_fan_div, move the calculation of the minimum limit inside the update lock. This ensures that the read-modify-write sequence operates on consistent data. Adhere to the principle of minimal changes by only converting macros that evaluate arguments multiple times and are used in lockless contexts.
Quoted source text, attributed separately from HOL analysis.