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> you have /dev/kmem access so could just edit the kernel data structures.

Not anymore: since kernel 2.6.26 /dev/kmem only exists if CONFIG_DEVKMEM is enabled, and it was removed completely in 5.13.

[1] https://lwn.net/Articles/851531/ [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin...



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