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.
References
Configurations
Configuration 1 (hide)
|
History
25 Mar 2026, 19:27
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/3dceb68f6ad33156032ef4da21a93d84059cca6d - Patch | |
| References | () https://git.kernel.org/stable/c/670d7ef945d3a84683594429aea6ab2cdfa5ceb4 - Patch | |
| References | () https://git.kernel.org/stable/c/a9fb6e8835a22f5796c1182ed612daed3fd273af - Patch | |
| References | () https://git.kernel.org/stable/c/bf5b03227f2e6d4360004886d268f9df8993ef8f - Patch | |
| References | () https://git.kernel.org/stable/c/c8cf0c2bdcccc6634b6915ff793b844e12436680 - Patch | |
| References | () https://git.kernel.org/stable/c/f2b579a0c37c0df19603d719894a942a295f634a - Patch | |
| References | () https://git.kernel.org/stable/c/f94800fbc26ccf7c81eb791707b038a57aa39a18 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.18:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.7 |
| CWE | CWE-367 | |
| First Time |
Linux
Linux linux Kernel |
19 Jan 2026, 13:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
14 Jan 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-01-14 15:16
Updated : 2026-03-25 19:27
NVD link : CVE-2025-71111
Mitre link : CVE-2025-71111
CVE.ORG link : CVE-2025-71111
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition