CVEs-PoC/2021/CVE-2021-47109.md

### [CVE-2021-47109](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47109)
![](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=5.0%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=58956317c8de52009d1a38a721474c24aef74fe7%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:neighbour: allow NUD_NOARP entries to be forced GCedIFF_POINTOPOINT interfaces use NUD_NOARP entries for IPv6. It's possible tofill up the neighbour table with enough entries that it will overflow forvalid connections after that.This behaviour is more prevalent after commit 58956317c8de ("neighbor:Improve garbage collection") is applied, as it prevents removal fromentries that are not NUD_FAILED, unless they are more than 5s old.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/NaInSec/CVE-LIST