CVEs-PoC/2021/CVE-2021-20268.md

### [CVE-2021-20268](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20268)
![](https://img.shields.io/static/v1?label=Product&message=kernel&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-20&color=brighgreen)

### Description

An out-of-bounds access flaw was found in the Linux kernel's implementation of the eBPF code verifier in the way a user running the eBPF script calls dev_map_init_map or sock_map_alloc. This flaw allows a local user to crash the system or possibly escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/dylandreimerink/gobpfld