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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-71111 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/670d7ef945d3a84683594429aea6ab2cdfa5ceb4 kernel.org
https://git.kernel.org/stable/c/a9fb6e8835a22f5796c1182ed612daed3fd273af kernel.org
https://git.kernel.org/stable/c/c8cf0c2bdcccc6634b6915ff793b844e12436680 kernel.org
https://git.kernel.org/stable/c/f2b579a0c37c0df19603d719894a942a295f634a kernel.org
https://git.kernel.org/stable/c/f94800fbc26ccf7c81eb791707b038a57aa39a18 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-71111
NVD Published Date:
01/14/2026
NVD Last Modified:
01/14/2026
Source:
kernel.org