Linux Kernel Use-After-Free Vulnerability in l3mdev_l3_out() Function

A use-after-free vulnerability has been identified in the Linux kernel within the l3mdev_l3_out() function. This issue arises because the function can be called without proper RCU (Read-Copy-Update) protection, potentially leading to a use-after-free condition. The vulnerability is addressed by adding an RCU read lock and unlock pair to ensure safe access.

Impact

Exploitation of this vulnerability could lead to a use-after-free condition, which may be exploited to cause memory corruption or arbitrary code execution.