int vfs_unlink(struct inode *dir, struct dentry *dentry, struct inode **delegated_inode)
{
	struct inode *target = dentry->d_inode;
	int error = may_delete(dir, dentry, 0);

	if (error)
		return error;

	if (!dir->i_op->unlink)
		return -EPERM;

	mutex_lock(&target->i_mutex);
	if (d_mountpoint(dentry))
		error = -EBUSY;
	else {
		error = security_inode_unlink(dir, dentry);
		if (!error) {
			error = try_break_deleg(target, delegated_inode);
			if (error)
				goto out;
			error = dir->i_op->unlink(dir, dentry);
			if (!error)
				dont_mount(dentry);
		}
	}
out:
	mutex_unlock(&target->i_mutex);

	/* We don't d_delete() NFS sillyrenamed files--they still exist. */
	if (!error && !(dentry->d_flags & DCACHE_NFSFS_RENAMED)) {
		fsnotify_link_count(target);
		d_delete(dentry);
	}

	return error;
}

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.