Has anyone installed the relevant firmware update https://support.apple.com/kb/DL1590 for 2010 MacBook Airs? I'd like to know if that introduces the same bug.
https://www.virtualbox.org/ticket/10965 indicates that it's the Ivy Bridge skus, so I think your 2010 Air is ok. Caveat emptor: I do NOT own a 2010 MacBook Air.