this post was submitted on 05 Apr 2024
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32-bit apps use a sub-set of the same instructions that still exist on current 64-bit systems. Running 64-bit alone does nothing to eliminate any flaws, real or imagined, from the 32-bit side of things.
As @jarfil@jarfil@beehaw.org has stated, 32 bit repos are being de-listed because no one can be bothered to maintain them(on a professional, full-time basis), and that lack of code/functional review could allow flaws to slip through. Meanwhile, a lot of those same 32-bit repos continue to exist(as community-maintained versions - my preferrence anyways) and can be accessed by interested users from most distros. They aren't blocked, just de-listed and unsupported by those distro maintainers.
Thanks for the explanation! I didn't realize it was mostly a maintenance limitation, I thought maybe 32-bit instructions could be an extra attack vector on a physical CPU instruction level or something like that.