cve/2018/CVE-2018-10901.md

### [CVE-2018-10901](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10901)
![](https://img.shields.io/static/v1?label=Product&message=kernel%3A&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-665&color=brighgreen)

### Description

A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.

### POC

#### Reference
- https://access.redhat.com/errata/RHSA-2018:2393
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
- https://www.oracle.com/security-alerts/cpujul2020.html

#### Github
No PoCs found on GitHub currently.