Hey Joshua, I suspect the word "known" is a challenging component to this great idea.
All SW bugs that are reported by customers are published in the Release Notes.
http://www.extremenetworks.com/support/release-notes/
About a year ago our Information Development team made these publicly available to all of our customers to reference. Since the Release Notes get published prior to the code being made available to customers, by the very basic definition of "known" could be found in the Release Notes "Open Issues, Known Behaviors, and Resolved Issues" section.
Now, I also recognize that's not entirely in the spirit of what you're looking for. GTAC may have seen an issue, thus the know about it, but we may not have a SW fix yet. That's where we use GTAC Knowledge and the Hub to communicate as much as we can about a problem, prior to having a formal fix. Once we get that official fix, the team evolves the content to update our users. If a users has a question on a particular topic, they can 1) give us feedback directly on the GTAC Knowledge Article or on that 2) particular Hub post.
There's always room for improvement and your suggestion of a "Bug" look up tool is a great one for the future. We'll definitely work on that as we continue to roll our Unified Search at Extreme.