CVE

CVE-2023-52864

Date: (C)2024-05-22   (M)2024-06-07

In the Linux kernel, the following vulnerability has been resolved: platform/x86: wmi: Fix opening of char device Since commit fa1f68db6ca7 ("drivers: misc: pass miscdevice pointer via file private data"), the miscdevice stores a pointer to itself inside filp->private_data, which means that private_data will not be NULL when wmi_char_open() is called. This might cause memory corruption should wmi_char_open() be unable to find its driver, something which can happen when the associated WMI device is deleted in wmi_free_devices(). Fix the problem by using the miscdevice pointer to retrieve the WMI device data associated with a char device using container_of(). This also avoids wmi_char_open() picking a wrong WMI device bound to a driver with the same name as the original driver.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:		CVSS V2 Severity:
CVSS Score : 7.1		CVSS Score :
Exploit Score:		Exploit Score:
Impact Score:		Impact Score:
CVSS V3 Metrics:		CVSS V2 Metrics:
Attack Vector:		Access Vector:
Attack Complexity:		Access Complexity:
Privileges Required:		Authentication:
User Interaction:		Confidentiality:
Scope:		Integrity:
Confidentiality:		Availability:
Integrity:
Availability:

Reference:

https://git.kernel.org/stable/c/36d85fa7ae0d6be651c1a745191fa7ef055db43e

https://git.kernel.org/stable/c/44a96796d25809502c75771d40ee693c2e44724e

https://git.kernel.org/stable/c/9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203

https://git.kernel.org/stable/c/cf098e937dd125c0317a0d6f261ac2a950a233d6

https://git.kernel.org/stable/c/d426a2955e45a95b2282764105fcfb110a540453

https://git.kernel.org/stable/c/e0bf076b734a2fab92d8fddc2b8b03462eee7097

https://git.kernel.org/stable/c/eba9ac7abab91c8f6d351460239108bef5e7a0b6

https://git.kernel.org/stable/c/fb7b06b59c6887659c6ed0ecd3110835eecbb6a3