Privilege Escalation Vulnerability in Linux Kernel by Linux Foundation

CVE-2023-46813

What is CVE-2023-46813?

A vulnerability has been identified in versions of the Linux kernel prior to 6.5.9, which allows local users with access to MMIO registers to exploit incorrect access checks in the #VC handler. The vulnerability centers around instruction emulation within SEV-ES that can enable arbitrary write access to kernel memory, facilitating privilege escalation. This flaw relies on a race condition where a userspace application can replace an instruction before it is processed by the #VC handler, leading to potential unauthorized control over the kernel.

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