### [CVE-2021-26339](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26339)
![](https://img.shields.io/static/v1?label=Product&message=Athlon%E2%84%A2%20Series&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=EPYC%E2%84%A2%20Processors&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Ryzen%E2%84%A2%20Series&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=various%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=tbd&color=brightgreen)

### Description

A bug in AMD CPU’s core logic may allow for an attacker, using specific code from an unprivileged VM, to trigger a CPU core hang resulting in a potential denial of service. AMD believes the specific code includes a specific x86 instruction sequence that would not be generated by compilers.

### POC

#### Reference
- https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027
- https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028

#### Github
- https://github.com/ARPSyndicate/cve-scores
- https://github.com/ep-infosec/50_google_silifuzz
- https://github.com/google/silifuzz
- https://github.com/suddenabnormalsecrets/silifuzz