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A comment on The NX bit is not just about security. Parent comment

Re:The NX bit is not just about security by jnwatson on Sunday September 06, 2026 @11:29PM (#49593562)
No, NX precedes Spectre by a long shot. It was originally intended so an attacker couldn't use a buffer overflow to change the PC and execute directly out of the attacker-controlled buffer.
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Re:The NX bit is not just about security by adrian_b on Monday September 07, 2026 @12:07AM (#49593775)
That is exactly what the poster to whom you replied said.

So Arm did not add another means to disable this kind of speculative execution, after Spectre was discovered, but they just reused the existing NX flag, expanding its functionality.

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Re:The NX bit is not just about security by samus on Monday September 07, 2026 @06:39AM (#49596616)
That poster wrote about speculative vulnerabilities. But buffer overflows have nothing to do with those.
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