cve/2021/CVE-2021-22600.md

### [CVE-2021-22600](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22600)
![](https://img.shields.io/static/v1?label=Product&message=Kernel&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%205.4.168%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-415%20Double%20Free&color=brighgreen)

### Description

A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755

### POC

#### Reference
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=ec6af094ea28f0f2dda1a6a33b14cd57e36a9755

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/IdanBanani/Linux-Kernel-VR-Exploitation
- https://github.com/Ostorlab/KEV
- https://github.com/Ostorlab/known_exploited_vulnerbilities_detectors
- https://github.com/r4j0x00/exploits
- https://github.com/terawhiz/exploits