cve/2023/CVE-2023-1872.md

### [CVE-2023-1872](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1872)
![](https://img.shields.io/static/v1?label=Product&message=Linux%20Kernel&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=5.7%3C%3D%205.17%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-416%20Use%20After%20Free&color=brighgreen)

### Description

A use-after-free vulnerability in the Linux Kernel io_uring system can be exploited to achieve local privilege escalation.The io_file_get_fixed function lacks the presence of ctx->uring_lock which can lead to a Use-After-Free vulnerability due a race condition with fixed files getting unregistered.We recommend upgrading past commit da24142b1ef9fd5d36b76e36bab328a5b27523e8.

### POC

#### Reference
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html

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