In the Linux kernel, the following vulnerability has been resolved:
hwmon: (w83791d) Fix NULL pointer dereference by removing unnecessary structure field
If driver read val value sufficient for
(val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val >> 4) & 0x7))
from device then Null pointer dereference occurs.
(It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers)
Also lm75[] does not serve a purpose anymore after switching to
devm_i2c_new_dummy_device() in w83791d_detect_subclients().
The patch fixes possible NULL pointer dereference by removing lm75[].
Found by Linux Driver Verification project (linuxtesting.org).
[groeck: Dropped unnecessary continuation lines, fixed multi-line alignment]
References
Configurations
Configuration 1 (hide)
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History
02 Apr 2025, 14:52
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* |
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| References | () https://git.kernel.org/stable/c/16887ae4e3defd2c4e7913b6c539f33eaf4eac5c - Patch | |
| References | () https://git.kernel.org/stable/c/44d3c480e4e2a75bf6296a18b4356157991ccd80 - Patch | |
| References | () https://git.kernel.org/stable/c/516d9055039017a20a698103be2b556b4c976bb8 - Patch | |
| References | () https://git.kernel.org/stable/c/943c15ac1b84d378da26bba41c83c67e16499ac4 - Patch | |
| First Time |
Linux linux Kernel
Linux |
Information
Published : 2024-05-21 15:15
Updated : 2025-04-02 14:52
NVD link : CVE-2021-47386
Mitre link : CVE-2021-47386
CVE.ORG link : CVE-2021-47386
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference