Execute Disable Bit allows the processor to classify areas in memory by where application code can execute and where it cannot. When a malicious worm attempts to insert code in the buffer, the processor disables code execution, preventing damage or worm propagation. To provide end-to-end no execute (NX) coverage, Intel will offer Execute Disable Bit for workstations, and other server products beginning in late Q3 2004. Desktop and workstation products are now shipping, with system availability in Q4 2004. Mobile products begin shipping in late Q4 2004, with system availability in Q1 2005.
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