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CVE-2021-47385 Details

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]

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278	kernel.org	Patch
https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3	kernel.org	Patch
https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1	kernel.org	Patch
https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3	kernel.org	Patch
https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278	CVE	Patch
https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3	CVE	Patch
https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1	CVE	Patch
https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3	CVE	Patch

see all 8 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-476	NULL Pointer Dereference	[email protected]

Affected Products

Product	Versions
linux linux kernel	< 5.4.151 >= 5.5, < 5.10.71 >= 5.11, < 5.14.10 5.15 rc1 5.15 rc2
CPE 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:::::: Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	kernel.org
Jun 17, 2026	CVE Modified	CISA-ADP
Dec 23, 2024	Initial Analysis	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 28, 2024	CVE Modified	kernel.org
May 21, 2024	New CVE Received	kernel.org