CVEs-PoC/2021/CVE-2021-20257.md

### [CVE-2021-20257](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20257)
![](https://img.shields.io/static/v1?label=Product&message=QEMU&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20Fixed-In%20v6.2.0%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-835&color=brighgreen)

### Description

An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

### POC

#### Reference
No PoCs from references.

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