XD bit (Execute Disable Bit)
E637386
XD bit (Execute Disable Bit) is a hardware-based security feature in modern processors that helps prevent certain types of malicious code execution by marking specific areas of memory as non-executable.
All labels observed (1)
| Label | Occurrences |
|---|---|
| XD bit (Execute Disable Bit) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7032637 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: XD bit (Execute Disable Bit) Context triple: [Bonnell, supports, XD bit (Execute Disable Bit)]
-
A.
Intel VT-x
Intel VT-x is Intel's hardware-assisted virtualization technology that enables more efficient and secure running of multiple operating systems on x86 processors.
-
B.
VMX
VMX is a vector processing extension to the PowerPC architecture designed to accelerate multimedia, signal processing, and other parallelizable computations.
-
C.
Intel VT-x or AMD-V
Intel VT-x or AMD-V are hardware-assisted virtualization technologies built into modern Intel and AMD processors that enable efficient and secure running of virtual machines.
-
D.
Trusted Execution Environment
A Trusted Execution Environment (TEE) is a secure area of a main processor that runs isolated code and protects sensitive data from the rest of the system, even if the operating system is compromised.
-
E.
Intel Trusted Execution Technology
Intel Trusted Execution Technology is a hardware-based security feature that helps ensure a trusted, measured launch and execution environment for software on Intel platforms.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: XD bit (Execute Disable Bit) Target entity description: XD bit (Execute Disable Bit) is a hardware-based security feature in modern processors that helps prevent certain types of malicious code execution by marking specific areas of memory as non-executable.
-
A.
Intel VT-x
Intel VT-x is Intel's hardware-assisted virtualization technology that enables more efficient and secure running of multiple operating systems on x86 processors.
-
B.
VMX
VMX is a vector processing extension to the PowerPC architecture designed to accelerate multimedia, signal processing, and other parallelizable computations.
-
C.
Intel VT-x or AMD-V
Intel VT-x or AMD-V are hardware-assisted virtualization technologies built into modern Intel and AMD processors that enable efficient and secure running of virtual machines.
-
D.
Trusted Execution Environment
A Trusted Execution Environment (TEE) is a secure area of a main processor that runs isolated code and protects sensitive data from the rest of the system, even if the operating system is compromised.
-
E.
Intel Trusted Execution Technology
Intel Trusted Execution Technology is a hardware-based security feature that helps ensure a trusted, measured launch and execution environment for software on Intel platforms.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
executable space protection mechanism
ⓘ
hardware-based security feature ⓘ processor feature ⓘ |
| abbreviationOf | Execute Disable Bit ⓘ |
| alsoKnownAs |
EVP
NERFINISHED
ⓘ
Enhanced Virus Protection ⓘ NX bit NERFINISHED ⓘ No-Execute bit ⓘ |
| architecture |
x86
NERFINISHED
ⓘ
x86-64 NERFINISHED ⓘ |
| bitLocation | page table entry ⓘ |
| category |
CPU security feature
ⓘ
memory protection mechanism ⓘ |
| configurableVia |
BIOS settings
ⓘ
UEFI firmware settings ⓘ |
| controls | executability of memory pages ⓘ |
| effect |
causes page fault on disallowed code execution
ⓘ
prevents execution from data-only memory regions ⓘ |
| fullName | Execute Disable Bit NERFINISHED ⓘ |
| helpsMitigate |
code injection attacks
ⓘ
heap-based buffer overflows ⓘ stack-based buffer overflows ⓘ |
| implementedAs | page table attribute bit ⓘ |
| introducedAround | early 2000s ⓘ |
| introducedBy | Intel NERFINISHED ⓘ |
| operatesOn |
memory pages
ⓘ
virtual memory ⓘ |
| purpose |
enforce non-executable memory pages
ⓘ
mitigate buffer overflow attacks ⓘ prevent execution of code from certain memory regions ⓘ support Data Execution Prevention ⓘ |
| relatedTo |
DEP
ⓘ
Data Execution Prevention NERFINISHED ⓘ W^X policy NERFINISHED ⓘ write XOR execute policy ⓘ |
| requires | page-level granularity ⓘ |
| requiresSupportFrom |
operating system
ⓘ
processor ⓘ |
| securityProperty |
enforces non-executable heap
ⓘ
enforces non-executable stack ⓘ |
| standardizedIn |
PAE paging
ⓘ
Physical Address Extension ⓘ |
| usedBy |
AMD processors
NERFINISHED
ⓘ
Intel processors NERFINISHED ⓘ Linux NX support ⓘ Windows Data Execution Prevention NERFINISHED ⓘ macOS memory protection ⓘ some ARM processors ⓘ x86-64 processors ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: XD bit (Execute Disable Bit) Description of subject: XD bit (Execute Disable Bit) is a hardware-based security feature in modern processors that helps prevent certain types of malicious code execution by marking specific areas of memory as non-executable.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.