CVE-2021-47384
kernel: hwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 21, 2024
Updated · October 31, 2026
Description
A vulnerability was found in the Linux kernel's hwmon driver for the w83793 module where NULL pointer dereference caused by an obsolete structure field lm75[]. During specific device read operations, if certain values are read from the device, the driver could attempt to access a NULL pointer, leading to potential system crashes or instability.
Statement
This vulnerability is rated as a moderate severity because the impact is limited to system stability rather than unauthorized access or data exposure.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference