I’ve spent quite a lot of time messing with x86_64 page tables, understanding address translation is not easy and when I started learning about it I felt like a lot of the material out there on how it works was hard for me to wrap my head around. So in this blog post I am going to attempt to provide a kind of “what I wish I had when learning about paging”.| zolutal's blog
As it turns out, on recent Ubuntu, Arch, Fedora, and likely other distro’s releases, with kernel versions >=5.18, library ASLR is literally broken for 32-bit libraries of at least 2MB in size, on certain filesystems. Also, ASLR’s entropy on 64-bit libraries that are at least 2MB is significantly reduced, 28 bits -> 19 bits, on certain filesystems.| zolutal's blog