Microsoft has released software patches fixing a handful of critical bugs in the Windows kernel, as well as flaws in the Windows Directory Name System and SChannel security software.
The software vendor rates the three Windows kernel bugs as critical because they could be used to create attack code that would run unauthorized software on a victim's machine. The SChannel and DNS bugs are given the less-scary rating of "important" by Microsoft, meaning the company doesn't think they're as likely to be used to take over a PC.
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