### [CVE-2017-7828](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7828)
![](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%2052.5%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2057%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Use-after-free%20of%20PressShell%20while%20restyling%20layout&color=brighgreen)

### Description

A use-after-free vulnerability can occur when flushing and resizing layout because the "PressShell" object has been freed while still in use. This results in a potentially exploitable crash during these operations. This vulnerability affects Firefox < 57, Firefox ESR < 52.5, and Thunderbird < 52.5.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ZihanYe/web-browser-vulnerabilities