.NET
This kernel level vulnerability allows root access on any machine running Version 2.4.0 through 2.5.69
http://www.eweek.com/article2/0,4149,1400446,00.asp
Another Interesting Story
MS-Linux? It Could Happen By Steven J. Vaughan-Nichols December 1, 2003 eWEEK.com Linux & Open Source Center Editor Steven J. Vaughan-Nichols thinks that Microsoft has laid the groundwork to offer its own Linux distribution—that is, if Linux gives the company too much competition.