cve/2023/CVE-2023-31248.md

### [CVE-2023-31248](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-31248)
![](https://img.shields.io/static/v1?label=Product&message=Linux%20Kernel&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20v5.9-rc1%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-416&color=brighgreen)

### Description

Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace

### POC

#### Reference
- http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html
- http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html

#### Github
- https://github.com/20142995/sectool
- https://github.com/Threekiii/CVE
- https://github.com/star-sg/CVE