CVE-2025-71111

MEDIUM EPSS 0.6%
Published Jan 14, 20265mo ago · Modified Jun 17, 20261w ago
4.7 CVSS 3.1
Medium
Find Similar
Published Jan 14, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
4.7
Exploitability
1.0
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
0.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-367

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥2.6.18.1  –  <5.10.248
linuxlinux_kernel*≥5.11  –  <5.15.198
linuxlinux_kernel*≥5.16  –  <6.1.160
linuxlinux_kernel*≥6.2  –  <6.6.120
linuxlinux_kernel*≥6.7  –  <6.12.64
linuxlinux_kernel*≥6.13  –  <6.18.3
linuxlinux_kernel2.6.18any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/3dceb68f6ad33156032ef4da21a93d84059cca6d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/670d7ef945d3a84683594429aea6ab2cdfa5ceb4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a9fb6e8835a22f5796c1182ed612daed3fd273af
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bf5b03227f2e6d4360004886d268f9df8993ef8f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c8cf0c2bdcccc6634b6915ff793b844e12436680
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f2b579a0c37c0df19603d719894a942a295f634a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f94800fbc26ccf7c81eb791707b038a57aa39a18
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/3dceb68f6ad33156032ef4da21a93d84059cca6d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/670d7ef945d3a84683594429aea6ab2cdfa5ceb4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a9fb6e8835a22f5796c1182ed612daed3fd273af
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bf5b03227f2e6d4360004886d268f9df8993ef8f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c8cf0c2bdcccc6634b6915ff793b844e12436680
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f2b579a0c37c0df19603d719894a942a295f634a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f94800fbc26ccf7c81eb791707b038a57aa39a18
    Patch