CVE-2025-21764

In the Linux kernel, the following vulnerability has been resolved:

ndisc: use RCU protection in ndisc_alloc_skb()

ndisc_alloc_skb() can be called without RTNL or RCU being held.

Add RCU protection to avoid possible UAF.

More information : https://git.kernel.org/stable/c/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d