The critical thing to understand is namespaces are visibility walls, not security boundaries. They prevent a process from seeing things outside its namespace. They do not prevent a process from exploiting the kernel that implements the namespace. The process still makes syscalls to the same host kernel. If there is a bug in the kernel’s handling of any syscall, the namespace boundary does not help.
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This has been a glorious year for bookworms. The quantity and quality of Stuff Your Kindle Days has been unprecedented, and the schedule is showing no signs of slowing down. We've got two events on the calendar for this week, but for now, the focus is firmly on the Sapphic Shelf Explosion.，更多细节参见51吃瓜