You might want to peruse some previous answers like /u/y_sengaku 's post in in What knowledge did mainland Europeans have of Iceland, Greenland and Vinland during the Middle Ages?.

To add some information here: First off, Vinland never had any kind of permanent settlement. The Vinland Sagas don't describe any permanent settlement, and the finds at L'Anse-aux-Meadows site in Newfoundland don't indicate one either. We don't know that anyone returned during the time there was a temporary settlement, so there would be no possibility of news.

As for what Europe eventually found out, Adam of Bremen is our earlist source that mentions Vinland, and he describes it as an island beyond which there is nothing. It's not necessarily very compelling. He also describes Greenland as being inhabited by people with blue-green skin (hence the name; the Saga of Erik the Red claim it was named 'Greenland' for marketing purposes) But Adam also (incorrectly) refers to Hålogaland as another island in the North Atlantic. He refers to cyclopes living in the mountains of Scandinavia and Amazon women living in the north of the Gulf of Bothnia. In short, his geography is not that credible.

In the Icelandic Sagas and other sources, which were not really known outside Iceland until hte 17th century, Vinland is not the only part of the New World mentioned; there is also Helluland and Markland (possibly Baffin Island and Labrador). Unlike Vinland, Markland was probably revisited by Greenlanders to get lumber; there's a mention of such a thing.

But the Vinland Sagas also have their own fantastical beasts inhabiting these lands, such as unipedes. They are written centuries after the events they purport to describe, in the mid-13th century and they are not independent sources of Adam, whose chronicle was well-known. (and itself quite derivative of other works)

Given that only a couple of sporadic attempts were made by Norse Greenlanders in the Middle Ages to go to Vinland, none of which are known to have gotten there, it doesn't seem there was much interest among those who knew about it. They didn't know it was a vast unexplored continent! Those who went there seem to have thought it too far away from civilization to bother with. To those on the continent it was yet another presumed or legendary faraway island and not necessarily more intresting than the fictional Thule or real Svalbarð (Jan Mayen or Spitsbergen).