UFS Command Management Issue in Linux Kernel

CVE-2023-53387

What is CVE-2023-53387?

A critical issue in the Linux kernel's UFS error handling process pertains to a device management command (NOP OUT). If the command times out and the mechanism to clear the doorbell fails, the function ufshcd_wait_for_dev_cmd() does not set the completion structure to NULL. Consequently, if the command has been completed by the device, a serious crash occurs at various stack levels, leading to a system panic. This vulnerability represents an important concern for users relying on the stability of devices managed by the Linux kernel, particularly with respect to operational consistency under error conditions.

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