cve/2020/CVE-2020-28941.md

### [CVE-2020-28941](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28941)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once.

### POC

#### Reference
- http://www.openwall.com/lists/oss-security/2020/11/19/5
- http://www.openwall.com/lists/oss-security/2020/11/19/5
- https://www.openwall.com/lists/oss-security/2020/11/19/3
- https://www.openwall.com/lists/oss-security/2020/11/19/3

#### Github
- https://github.com/Live-Hack-CVE/CVE-2020-28941