### [CVE-2021-33455](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33455)
![](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 yasm version 1.3.0. There is a NULL pointer dereference in do_directive() in modules/preprocs/nasm/nasm-pp.c.

### POC

#### Reference
- https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d
- https://github.com/yasm/yasm/issues/169

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