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Kent_Perrier_50's avatar
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Feb 28, 2011

Consequences of hiding the NX/DX flag

Our VM admins want us to hide the NX/DX flag from all of our VMs. The OVA files comes with it exposed to the guest. What are the implications of hiding that flag?





2 Replies

  • I don't think there is any consequence of hiding this flag. It's not used for a performance boost but more towards security feature *CMIIW*



    Taken from :



    NX/DX is used to mark certain areas of memory as non-executable so CPU will refuse to execute any code residing this area. This technique is used to prevent a malicious software from inserting their code into another program's data storage area and running their own code from within this section (aka. buffer overflow attack).