CVE-2021-47386
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47386
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47386.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-47386
- Downstream
- Related
- Published
- 2024-05-21T15:15:24Z
- Modified
- 2025-08-09T20:01:27Z
- Summary
- [none]
- Details
-
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 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 alignment]
- References