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markasoftware • yesterday at 8:28 PM • 3 replies • view on HN

Xen had a generic guest to host vulnerability disclosed in the last few days: https://codeant.ai/security-research/xenbleed-a-grant-copy-c...


Replies

eddythompson80 • yesterday at 8:59 PM

Yeah, all security design guarantees are as good as the implementation at the end of the day. All the fancy hashing and encryption math in the world isn't gonna save you from an erroneous `"" == ""` check or an invalid reference check.

I was replying to OP saying it's the same "approach" as Xen, if your preference is "approach" based. It's fair though to point to Nova's smaller code base. It's becoming an important metric for me in general (how big is the code base). It's not a bullet proof thing, but having a smaller code base is a positive sign in 2026 for me.

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zobzu • today at 5:52 AM

having worked with AWS, xen had a lot of very bad vulns over its lifetime as well.

there's no magic.

ThePowerOfFuet • yesterday at 9:29 PM

Now compare to Linux, which is the point raised. Nobody said alternatives like Xen are perfect... but my oh my, some are much better in this regard.