CVEs-PoC/2020/CVE-2020-26971.md

### [CVE-2020-26971](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26971)
![](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%2078.6%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2084%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Heap%20buffer%20overflow%20in%20WebGL&color=brighgreen)

### Description

Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1663466

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