### [CVE-2021-20219](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20219)
![](https://img.shields.io/static/v1?label=Product&message=kernel&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=kernel%204.18%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-697&color=brightgreen)

### Description

A denial of service vulnerability was found in n_tty_receive_char_special in drivers/tty/n_tty.c of the Linux kernel. In this flaw a local attacker with a normal user privilege could delay the loop (due to a changing ldata->read_head, and a missing sanity check) and cause a threat to the system availability.

### POC

#### Reference
No PoCs from references.

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