dophn_core(struct magic_set *ms, int clazz, int swap, int fd, off_t off,
    int num, size_t size, off_t fsize, int *flags, uint16_t *notecount)
{
	Elf32_Phdr ph32;
	Elf64_Phdr ph64;
	size_t offset, len;
	unsigned char nbuf[BUFSIZ];
	ssize_t bufsize;
	off_t ph_off = off;
	int ph_num = num;

	if (size != xph_sizeof) {
		if (file_printf(ms, ", corrupted program header size") == -1)
			return -1;
		return 0;
	}

	/*
	 * Loop through all the program headers.
	 */
	for ( ; num; num--) {
		if (pread(fd, xph_addr, xph_sizeof, off) < (ssize_t)xph_sizeof) {
			file_badread(ms);
			return -1;
		}
		off += size;

		if (fsize != SIZE_UNKNOWN && xph_offset > fsize) {
			/* Perhaps warn here */
			continue;
		}

		if (xph_type != PT_NOTE)
			continue;

		/*
		 * This is a PT_NOTE section; loop through all the notes
		 * in the section.
		 */
		len = xph_filesz < sizeof(nbuf) ? xph_filesz : sizeof(nbuf);
		if ((bufsize = pread(fd, nbuf, len, xph_offset)) == -1) {
			file_badread(ms);
			return -1;
		}
		offset = 0;
		for (;;) {
			if (offset >= (size_t)bufsize)
				break;
			offset = donote(ms, nbuf, offset, (size_t)bufsize,
			    clazz, swap, 4, flags, notecount, fd, ph_off,
			    ph_num, fsize);
			if (offset == 0)
				break;

		}
	}
	return 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.