CVE-2023-53454

In the Linux kernel, the following vulnerability has been resolved:

HID: multitouch: Correct devm device reference for hidinput input_dev name

Reference the HID device rather than the input device for the devm allocation of the input_dev name. Referencing the input_dev would lead to a use-after-free when the input_dev was unregistered and subsequently fires a uevent that depends on the name. At the point of firing the uevent, the name would be freed by devres management.

Use devm_kasprintf to simplify the logic for allocating memory and formatting the input_dev name string.

The HID multitouch driver freed input_dev->name via devres when unregistering the input device, but a subsequent uevent still referenced it, leading to a use-after-free and potential kernel crash. Exploitation requires physical interaction with a HID device (attach/detach).

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.