CVEs-PoC/2021/CVE-2021-38496.md

### [CVE-2021-38496](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38496)
![](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=unspecified%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Use-after-free%20in%20MessageTask&color=brightgreen)

### Description

During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1725335

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