Exploit for Incorrect Authorization in Canonical Ubuntu_Linux CVE-2023-2640 CVE-2023-3262

Name: Exploit for Incorrect Authorization in Canonical Ubuntu_Linux CVE-2023-2640 CVE-2023-3262
Rating: 5 (136 reviews)

2026-04-04 | CVSS 7.8

## https://sploitus.com/exploit?id=A11C2E45-C20B-54F8-ACD9-E9C8E9911853
# CVE-2023-2640/3262-PoC

Minimal PoCs for Ubuntu OverlayFS local privilege escalation vulnerabilities.

## CVEs

- CVE-2023-2640 – OverlayFS permission handling issue  
- CVE-2023-3262 – OverlayFS capability escalation issue  

## Files

- `CVE-2023-2640.sh` – basic OverlayFS behavior test  
- `CVE-2023-3262.sh` – capability escalation PoC  
- `exploit_chain.sh` – combined exploit (root)

## Requirements

- Vulnerable Ubuntu system  
- Local access  
- `unshare`, `setcap`, `mount`

## Usage

```bash
chmod +x *.sh
./exploit_chain.sh