Various advanced key technologies can be effectively implemented on Linux cause its stability, high efficiency and open source nature. However, Linux Operating System(OS) itself and some of the services Linux-based inevitably have their vulnerability, namely Linux is not absolutely safe. This paper attempts to review and discuss the Linux vulnerabilities, which originates from Linux OS itself and some of the services shipped in Linux, with related cases presented. And Linux security enhancements, Linux OS hardening and Linux Security Modules (LSM),are systematically described and studied.

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Abstract-The paper provides a brief introduction about VxWorks, analyzestheimportanceofOSsecurity, discusses the current revealed vulnerabilities, describes the risks、the attack paths、and the affected systems about them, and gives the solutions on this foundation.