### [CVE-2021-29985](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29985)
![](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%2078.13%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2091%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Use-after-free%20media%20channels&color=brighgreen)

### Description

A use-after-free vulnerability in media channels could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1722083

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