Linux Kernel RCU Protection Vulnerability in Neighbour Notification

A vulnerability in the Linux kernel's neighbour notification process has been addressed. The issue arose because the __neigh_notify()__ function could be called without proper protection from the RTNL or RCU, potentially leading to a use-after-free condition. The vulnerability has been resolved by implementing RCU protection in the notification process.

Impact

Exploitation of this vulnerability could lead to a use-after-free condition, which may be exploited to execute arbitrary code or cause a denial-of-service condition.