Race Condition in Linux Kernel Network Device Operations

CVE-2025-21701

What is CVE-2025-21701?

A vulnerability in the Linux kernel manifests as a race condition between the unregistration of network devices and ongoing ethnl operations. When a device is being unregistered, simultaneous modifications to its number of channels can produce warnings and lock issues, leading to potential instability. This vulnerability emphasizes the importance of synchronization in network operations to prevent device failure or unexpected behaviors.

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