CVE-2021-47385

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]

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278	Patch
https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3	Patch
https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1	Patch
https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3	Patch
https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278	Patch
https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3	Patch
https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1	Patch
https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3	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 : 2024-12-23 21:01

NVD link : CVE-2021-47385

Mitre link : CVE-2021-47385

CVE.ORG link : CVE-2021-47385

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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