### [CVE-2021-33462](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33462)
![](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 use-after-free in expr_traverse_nodes_post() in libyasm/expr.c.

### POC

#### Reference
- https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d
- https://github.com/yasm/yasm/issues/165

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