CVEs-PoC/2021/CVE-2021-26402.md

### [CVE-2021-26402](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26402)
![](https://img.shields.io/static/v1?label=Product&message=2nd%20Gen%20EPYC&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=3rd%20Gen%20EPYC&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=Various%20%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=various%20%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

Insufficient bounds checking in ASP (AMD Secure Processor) firmware while handling BIOS mailbox commands, may allow an attacker to write partially-controlled data out-of-bounds to SMM or SEV-ES regions which may lead to a potential loss of integrity and availability.

### POC

#### Reference
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032

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