static long vmsplice_to_pipe(struct file *file, const struct iovec __user *iov,
			     unsigned long nr_segs, unsigned int flags)
{
	struct pipe_inode_info *pipe;
	struct page *pages[PIPE_DEF_BUFFERS];
	struct partial_page partial[PIPE_DEF_BUFFERS];
	struct splice_pipe_desc spd = {
		.pages = pages,
		.partial = partial,
		.nr_pages_max = PIPE_DEF_BUFFERS,
		.flags = flags,
		.ops = &user_page_pipe_buf_ops,
		.spd_release = spd_release_page,
	};
	long ret;

	pipe = get_pipe_info(file);
	if (!pipe)
		return -EBADF;

	if (splice_grow_spd(pipe, &spd))
		return -ENOMEM;

	spd.nr_pages = get_iovec_page_array(iov, nr_segs, spd.pages,
					    spd.partial, false,
					    spd.nr_pages_max);
	if (spd.nr_pages <= 0)
		ret = spd.nr_pages;
	else
		ret = splice_to_pipe(pipe, &spd);

	splice_shrink_spd(&spd);
	return ret;
}

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