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
- 2025-07-29T10:13:38.741274Z
- 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
-
- https://git.kernel.org/stable/c/6cb01fe630eaffc5a2c3f7364436caddba286623
- https://git.kernel.org/stable/c/746011193f44f97f8784edcf8327c587946745fc
- https://git.kernel.org/stable/c/7c4fd5de39f273626a2b0f3a446d2cc85cd47616
- https://git.kernel.org/stable/c/dd4d747ef05addab887dc8ff0d6ab9860bbcd783
- https://security-tracker.debian.org/tracker/CVE-2021-47384
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source