Subj : [$] Page-table hardening with memory protection keys
To   : All
From : LWN.net
Date : Thu Jan 09 2025 15:30:05

[$] Page-table hardening with memory protection keys

Date:
Thu, 09 Jan 2025 15:16:17 +0000

Description:
Attacks on the kernel can take many forms; one popular exploitation path is
to find a way to overwrite some memory with attacker-supplied data.  If the
right memory can be targeted, one well-targeted stray write is all that is
needed to take control of the system.  Since the system's page tables
regulate access to memory, they are an attractive target for this type of
attack. This patch 
set from Kevin Brodsky is an attempt to protect page tables (and,
eventually, other data structures) using the "memory protection keys"
feature provided by a number of CPU architectures.

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Link to news story:
https://lwn.net/Articles/1004029/


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