### [CVE-2021-47567](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47567)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=3b234b4a6651ed6bdca94553aa0038fc7ded9271%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=5.10%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=c118c7303ad528be8ff2aea8cd1ee15452c763f0%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=blue)

### Description

In the Linux kernel, the following vulnerability has been resolved:powerpc/32: Fix hardlockup on vmap stack overflowSince the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do notactivate MMU before reading task struct") a vmap stack overflowresults in a hard lockup. This is because emergency_ctx is stilladdressed with its virtual address allthough data MMU is not activeanymore at that time.Fix it by using a physical address instead.

### POC

#### Reference
No PoCs from references.

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