The US Computer Emergency Response Team has said Linux and Unix security bugs outnumbered those found in Microsoft Windows by three-to-one last year.
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CERT recorded more than 5,000 security vulnerabilities in 2005. The well-respected security organisation said a total of 5,198 vulnerabilities were reported, which included 2,328 for Linux and Unix. This was 45% of the total.
Windows was affected by 812 flaws, or 16% of the total. A further 2,058 flaws were cross-platform.
The vulnerabilities reported covered areas like web browsers and music players, as well as main operating systems.
But the figures don't indicate the impact of flaws. Windows bugs usually cause more widespread consternation as a result of more pervasive Windows use.