Use-After-Free Vulnerability in Linux Kernel's SCSI Subsystem

CVE-2022-50422

What is CVE-2022-50422?

A use-after-free vulnerability exists in the SCSI Linux kernel module due to improper timer handling in the smp_execute_task_sg() function. When a task execution fails, improper cancellation of a timer leads to potential access of deallocated memory. The flaw occurs in a multi-threaded context where one thread may free memory while another is still using it, creating a critical risk for system stability and security. The issue has been addressed by implementing a synchronized deletion of the timer to ensure that the timer's handler execution is complete before the memory is deallocated.

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