CVE-2021-47385

hwmon: (w83792d) Fix NULL pointer dereference by removing unnecessary structure field

Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83792d) 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 multipline alignment]

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1 patch
https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3 patch
https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3 patch
https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278 patch

Frequently Asked Questions

What is the severity of CVE-2021-47385?
CVE-2021-47385 has been scored as a medium severity vulnerability.
How to fix CVE-2021-47385?
To fix CVE-2021-47385, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47385 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-47385 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47385?
CVE-2021-47385 affects Linux Linux, Linux Linux.
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