static int asn1_encode_se_info(sc_context_t *ctx,
		struct sc_pkcs15_sec_env_info **se, size_t se_num,
		unsigned char **buf, size_t *bufsize, int depth)
{
	unsigned char *ptr = NULL, *out = NULL, *p;
	size_t ptrlen = 0, outlen = 0, idx;
	int ret;

	for (idx=0; idx < se_num; idx++)   {
		struct sc_asn1_entry asn1_se[2];
		struct sc_asn1_entry asn1_se_info[4];

		sc_copy_asn1_entry(c_asn1_se, asn1_se);
		sc_copy_asn1_entry(c_asn1_se_info, asn1_se_info);

		sc_format_asn1_entry(asn1_se_info + 0, &se[idx]->se, NULL, 1);
		if (sc_valid_oid(&se[idx]->owner))
			sc_format_asn1_entry(asn1_se_info + 1, &se[idx]->owner, NULL, 1);
		if (se[idx]->aid.len)
			sc_format_asn1_entry(asn1_se_info + 2, &se[idx]->aid.value, &se[idx]->aid.len, 1);
		sc_format_asn1_entry(asn1_se + 0, asn1_se_info, NULL, 1);

		ret = sc_asn1_encode(ctx, asn1_se, &ptr, &ptrlen);
		if (ret != SC_SUCCESS)
			goto err;

		if (!ptrlen)
			continue;
		p = (unsigned char *) realloc(out, outlen + ptrlen);
		if (!p)   {
			ret = SC_ERROR_OUT_OF_MEMORY;
			goto err;
		}
		out = p;
		memcpy(out + outlen, ptr, ptrlen);
		outlen += ptrlen;
		free(ptr);
		ptr = NULL;
		ptrlen = 0;
	}

	*buf = out;
	*bufsize = outlen;
	ret = SC_SUCCESS;
err:
	if (ret != SC_SUCCESS && out != NULL)
		free(out);
	return ret;
}

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.