I found this picture of a fox in a news article about arctic foxes in Sweden (source), but I'm not sure whether it is actually an arctic fox.
On the one hand, it has white fur, which is the correct winter coat for an arctic fox. On the other hand, the fox's ears do not have the distinctive shape of arctic fox ears, but ears that look more like red fox ears.
The image credit given by the article is just "iStock", so I searched iStock to see if I could find more information about the photo. I found another photo of the same fox here, also labeled as an arctic fox, but not really any further information.
What species is this fox?