CVE-2021-47384

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 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 alignments]

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/6cb01fe630eaffc5a2c3f7364436caddba286623	Patch
https://git.kernel.org/stable/c/746011193f44f97f8784edcf8327c587946745fc	Patch
https://git.kernel.org/stable/c/7c4fd5de39f273626a2b0f3a446d2cc85cd47616	Patch
https://git.kernel.org/stable/c/dd4d747ef05addab887dc8ff0d6ab9860bbcd783	Patch
https://git.kernel.org/stable/c/6cb01fe630eaffc5a2c3f7364436caddba286623	Patch
https://git.kernel.org/stable/c/746011193f44f97f8784edcf8327c587946745fc	Patch
https://git.kernel.org/stable/c/7c4fd5de39f273626a2b0f3a446d2cc85cd47616	Patch
https://git.kernel.org/stable/c/dd4d747ef05addab887dc8ff0d6ab9860bbcd783	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:5.15:rc1::::::
	cpe:2.3:o:linux:linux_kernel:5.15:rc2::::::
	cpe:2.3:o:linux:linux_kernel:5.15:rc3::::::

History

No history.

Information

Published : 2024-05-21 15:15

Updated : 2025-04-02 14:52

NVD link : CVE-2021-47384

Mitre link : CVE-2021-47384

CVE.ORG link : CVE-2021-47384

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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