cve/2020/CVE-2020-6807.md

### [CVE-2020-6807](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6807)
![](https://img.shields.io/static/v1?label=Product&message=Firefox%20ESR&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Thunderbird&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2068.6%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2074%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Use-after-free%20in%20cubeb%20during%20stream%20destruction&color=brighgreen)

### Description

When a device was changed while a stream was about to be destroyed, the <code>stream-reinit</code> task may have been executed after the stream was destroyed, causing a use-after-free and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.

### POC

#### Reference
- https://usn.ubuntu.com/4328-1/
- https://usn.ubuntu.com/4328-1/

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