Detections
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CVE-2023-46813
high
Description
An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege escalation). This depends on a race condition through which userspace can replace an instruction before the #VC handler reads it.
References
https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.9