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November: Hacker leaks VMware ESX kernel source code to the Web
More from Anonymous, as hackers associated with the collective leaked the VMware ESX Server's kernel source code to the Web. The 2MB file (compressed) was small in size but the independently verified source code was out in the open.
Because kernel source code doesn't change much, "some core functionality still stays the same," the hacker said, indicating that users of the bare bones operating system-independent virtualization server could be at risk for future hacks. VMware said in a public statement that "more related files will be posted in the future," as the virtualization giant scrambled to update its platform to ensure its customers are secure.