Data Race Vulnerability in Linux Kernel Media Driver

CVE-2023-53519

What is CVE-2023-53519?

This vulnerability in the Linux kernel's media subsystem relates to a data race condition within the v4l2-mem2mem functionality. The issue arises when multiple tasks attempt to access and modify the parameter 'num_rdy' without proper synchronization, leading to potential inconsistencies in the buffer queueing mechanism. This situation was identified through kernel concurrency sanitization (KCSAN), highlighting the need for a locking mechanism to ensure the integrity of operations related to source and destination buffers. The resolution demonstrates the importance of safeguarding shared resources in concurrent processing environments.

References