### [CVE-2015-4164](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4164)
![](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

The compat_iret function in Xen 3.1 through 4.5 iterates the wrong way through a loop, which allows local 32-bit PV guest administrators to cause a denial of service (large loop and system hang) via a hypercall_iret call with EFLAGS.VM set.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/pigram86/cookbook-xs-maintenance