Execute Disable Bit (EDB) is an Intelhardware-based security feature that can help reduce
system exposure to viruses and malicious code.
EDB allows the processor to classify areas in
memory where application
code can or cannot execute. When a malicious worm
attempts to insert code in the buffer, the processor disables code execution,
preventing damage and worm propagation. To use Execute Disable Bit you must have
a PC or server with a processor
with Execute Disable Bit capability and a supporting operating system. EDB-enabled
processors by Intel are indicated by a "J" after the CPU model number.
Execute Disable Bit is abbreviated as EDB (by Intel) or XDB.
Intel's Home Page Offers a list of company news items and information about their products. Additionally, there are links to a software showcase, developer's area, customer support, and newsgroup forums.
Execute Disable Bit Functionality Blocks Malware Code (PDF) Execute Disable Bit capability is an enhancement to 32-bit Intel architecture. An IA-32 processor with Execute Disable Bit capability can protect data pages against being used by malicious software to execute code.
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