Vulnerability in Linux Kernel Affecting Mellanox MLX5 Networking Driver

CVE-2023-53347

What is CVE-2023-53347?

A vulnerability in the Mellanox MLX5 networking driver within the Linux kernel can lead to critical operational disruptions. This issue arises when transitioning a device from switchdev mode to legacy mode. The driver improperly manages the pairing of the E-switch during uplink un/load API operations. If a peer device's flow remains offloaded and the first device to be removed is the peer, the driver may encounter a kernel error leading to potential system instability. This is due to the original E-switch holding a pointer to a flow that has since been invalidated. The resolution of this vulnerability requires careful handling of unpairing processes within the uplink API.

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