CVEs-PoC/2021/CVE-2021-23994.md

### [CVE-2021-23994](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23994)
![](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%2078.10%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2088%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Out%20of%20bound%20write%20due%20to%20lazy%20initialization&color=brighgreen)

### Description

A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound write. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1699077

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