Network Driver Vulnerability in Renesas Ethernet Devices

CVE-2025-21801

Summary

A vulnerability in the Renesas Ethernet driver has been identified that affects the proper handling of the rtnl lock during suspend/resume operations. Failure to correctly implement the rtnl lock can lead to potential conflicts with ongoing network driver operations, triggering warnings concerning RCU usage. This could compromise the stability and reliability of network communications in devices utilizing this driver, particularly during critical suspend or resume cycles. Ensuring that the lock is held as necessary mitigates these risks, strengthening the overall integrity of the network subsystem.

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