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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-47386 Detail

Description

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]


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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Hyperlink Resource
https://git.kernel.org/stable/c/16887ae4e3defd2c4e7913b6c539f33eaf4eac5c
https://git.kernel.org/stable/c/16887ae4e3defd2c4e7913b6c539f33eaf4eac5c
https://git.kernel.org/stable/c/44d3c480e4e2a75bf6296a18b4356157991ccd80
https://git.kernel.org/stable/c/44d3c480e4e2a75bf6296a18b4356157991ccd80
https://git.kernel.org/stable/c/516d9055039017a20a698103be2b556b4c976bb8
https://git.kernel.org/stable/c/516d9055039017a20a698103be2b556b4c976bb8
https://git.kernel.org/stable/c/943c15ac1b84d378da26bba41c83c67e16499ac4
https://git.kernel.org/stable/c/943c15ac1b84d378da26bba41c83c67e16499ac4

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference CISA-ADP  

Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47386
NVD Published Date:
05/21/2024
NVD Last Modified:
11/21/2024
Source:
kernel.org