cve/2023/CVE-2023-46837.md

### [CVE-2023-46837](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-46837)
![](https://img.shields.io/static/v1?label=Product&message=Xen&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

Arm provides multiple helpers to clean & invalidate the cachefor a given region.  This is, for instance, used when allocatingguest memory to ensure any writes (such as the ones during scrubbing)have reached memory before handing over the page to a guest.Unfortunately, the arithmetics in the helpers can overflow and wouldthen result to skip the cache cleaning/invalidation.  Therefore thereis no guarantee when all the writes will reach the memory.This undefined behavior was meant to be addressed by XSA-437, but theapproach was not sufficient.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds