CVEs-PoC/2021/CVE-2021-29980.md

### [CVE-2021-29980](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29980)
![](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=Uninitialized%20memory%20in%20a%20canvas%20object%20could%20have%20led%20to%20memory%20corruption&color=brighgreen)

### Description

Uninitialized memory in a canvas object could have caused an incorrect free() leading 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
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon