CVEs-PoC/2018/CVE-2018-10853.md

### [CVE-2018-10853](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10853)
![](https://img.shields.io/static/v1?label=Product&message=kernel&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-250&color=brighgreen)

### Description

A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.

### POC

#### Reference
- https://usn.ubuntu.com/3777-1/
- https://usn.ubuntu.com/3777-2/

#### Github
- https://github.com/ARPSyndicate/cvemon