cve/2020/CVE-2020-25668.md

### [CVE-2020-25668](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25668)
![](https://img.shields.io/static/v1?label=Product&message=Linux%20Kernel&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-362%20-%3E%20CWE-416&color=brighgreen)

### Description

A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font_op.

### POC

#### Reference
- http://www.openwall.com/lists/oss-security/2020/10/30/1
- http://www.openwall.com/lists/oss-security/2020/10/30/1
- http://www.openwall.com/lists/oss-security/2020/11/04/3
- http://www.openwall.com/lists/oss-security/2020/11/04/3
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=90bfdeef83f1d6c696039b6a917190dcbbad3220
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=90bfdeef83f1d6c696039b6a917190dcbbad3220
- https://www.openwall.com/lists/oss-security/2020/10/30/1,
- https://www.openwall.com/lists/oss-security/2020/10/30/1,
- https://www.openwall.com/lists/oss-security/2020/11/04/3,
- https://www.openwall.com/lists/oss-security/2020/11/04/3,

#### Github
- https://github.com/hshivhare67/Kernel_4.1.15_CVE-2020-25668