Kernel Vulnerability in the Linux Kernel Affecting Multiple Network Components

CVE-2025-21675

Summary

A vulnerability in the Linux kernel's mlx5 network components allows a NULL pointer dereference, potentially leading to system crashes. If port selection structure fails to initialize correctly, it results in double destruction of lag definers. This creates stale values in the system, triggering a kernel crash and unstable behavior in network operations. Proper error handling and port state management are crucial to mitigate these issues.

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