Linux Kernel Vulnerability Affecting Arp_xmit Functionality

CVE-2025-21762

What is CVE-2025-21762?

A vulnerability exists within the Linux kernel related to the arp_xmit function, where it can be invoked without the necessary RTNL or RCU protections. This oversight can lead to potential use-after-free (UAF) conditions, which may compromise system stability and security. The kernel community has implemented RCU protection to mitigate these risks and enhance the robustness of the arp_xmit functionality.

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