After Patched SUPEE-6788, product not displaying on home page in Magento

This error is error of permissions, which display products on home page. So follow below steps.

After patched,  add some section in your admin.

Open System -> permission -> blocks

Here, You must add the home page blocks for allowed permissions. Like, if you want to display new products, so add New Block "catalog/product_new" in Block Name and "Is Allowed" is Yes.

After Add New Block,  flush cache and reload home page. Now, New Products are displaying on HomePage