Linux Kernel Vulnerability in mlx5e Driver Affecting Network Traffic Handling

CVE-2023-53394

What is CVE-2023-53394?

A vulnerability in the Linux kernel's mlx5e driver has been identified, concerning the improper handling of request queues (rqs) when XSK sockets are closed. Specifically, a crash may occur when the regular rq is reactivated after an XSK socket has been shut down, leading to the reading of stale completion queue entries (cqes) and ultimately resulting in a disruption of network traffic. This situation can cause system instability manifested by crashes upon closing or deactivating the rq. To address this issue, a patch has been implemented that ensures all cqes are flushed during the rq flushing process, thereby preventing potential data corruption and enhancing the overall reliability of network traffic management.

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