CVEs-PoC/2021/CVE-2021-23981.md

### [CVE-2021-23981](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23981)
![](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%2078.9%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2087%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Texture%20upload%20into%20an%20unbound%20backing%20buffer%20resulted%20in%20an%20out-of-bound%20read&color=brighgreen)

### Description

A texture upload of a Pixel Buffer Object could have confused the WebGL code to skip binding the buffer used to unpack it, resulting in memory corruption and a potentially exploitable information leak or crash. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1692832

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