static void fib6_link_table(struct net *net, struct fib6_table *tb)
{
	unsigned int h;

	/*
	 * Initialize table lock at a single place to give lockdep a key,
	 * tables aren't visible prior to being linked to the list.
	 */
	rwlock_init(&tb->tb6_lock);

	h = tb->tb6_id & (FIB6_TABLE_HASHSZ - 1);

	/*
	 * No protection necessary, this is the only list mutatation
	 * operation, tables never disappear once they exist.
	 */
	hlist_add_head_rcu(&tb->tb6_hlist, &net->ipv6.fib_table_hash[h]);
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.