Linux Kernel Vulnerability in TCP Metrics Handling by The Linux Foundation

CVE-2025-40075

What is CVE-2025-40075?

A vulnerability has been identified in the Linux kernel concerning the handling of TCP metrics. The issue arises from the use of the dst_dev() function, which has been modified to utilize a lockdep enabled helper, dst_dev_net_rcu(). This change enhances the kernel's resource management capabilities by improving the handling of destination devices, addressing potential risks associated with concurrency in network programming. Implementing this fix is essential for ensuring robust network security and maintaining the integrity of system processes.

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