CVEs-PoC/2021/CVE-2021-3679.md

### [CVE-2021-3679](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3679)
![](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-400&color=brighgreen)

### Description

A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.

### POC

#### Reference
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16a

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/aegistudio/RingBufferDetonator
- https://github.com/nomi-sec/PoC-in-GitHub