Here is the secret to learning a song, and feeling good for learning it yourself.
Get the guitar tab (not the tab, but the chord sheet) and play the bassline over that. It may not be 100% accurate, but itll be your interpretation of it.
Or get the bass tab. And then you may be playing it right. Or do what I can't and work it out. Confound my low fidelity ears (it's the best reason I can think of for my poor performance).
This site has the tab you requested (My December) plus several other Linkin Park tabs. I do not vouch for the quality of the tabs, however. Personally, I can't stand internet tabs, but recognize that some beginners do find them helpful.
tabs 
