cve/2023/CVE-2023-46813.md

### [CVE-2023-46813](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-46813)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### 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.

### POC

#### Reference
- https://bugzilla.suse.com/show_bug.cgi?id=1212649

#### Github
- https://github.com/Freax13/cve-2023-46813-poc
- https://github.com/nomi-sec/PoC-in-GitHub
- https://github.com/shakyaraj9569/Documentation