CVE-2021-47384

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47384
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47384.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-47384
Downstream
Related
Published
2024-05-21T15:15:23Z
Modified
2025-08-09T19:01:27Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

hwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field

If driver read tmp value sufficient for (tmp & 0x08) && (!(tmp & 0x80)) && ((tmp & 0x7) == ((tmp >> 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 devmi2cnewdummydevice() in w83791ddetectsubclients().

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 alignments]

References

Affected packages