Privilege Escalation Vulnerability in Ubuntu OverlayFS
CVE-2023-2640

7.8HIGH

Key Information:

Vendor: Canonical
Status: Ubuntu Kernel
Vendor: CVE Published:; 26 July 2023

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👾 Exploit Exists🟡 Public PoC🟣 EPSS 91%📰 News Worthy

What is CVE-2023-2640?

A vulnerability in Ubuntu's OverlayFS allows unprivileged users to bypass security checks, enabling them to set privileged extended attributes on files within the mounted filesystem. This flaw could lead to unauthorized access and manipulation of upper files, compromising the integrity and security of the system.

Affected Version(s)

Ubuntu Kernel Linux 0 < 6.2.0-26.26

Ubuntu Kernel Linux 0 < 6.0.0-1020.20

Ubuntu Kernel Linux 0 < 5.4.0-155.172

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2023-2640-CVE-2023-32629
Created by g1vi

Metasploit exploit module for CVE-2023-2640
Created by Rapid7

GameOverlayFS
Created by luanoliveira350

News Articles

SecurityWeek

CVE-2023-2640

Two New Vulnerabilities Could Affect 40% of Ubuntu Cloud Workloads

Two easily exploitable vulnerabilities in the Ubuntu OverlayFS module (CVE-2023-2640 and CVE-2023-32629 could impact 40% of Ubuntu workloads.

wiz.io

CVE-2023-32629 CVE-2023-2640

GameOverlay Vulnerability Impacts 40% of Ubuntu Workloads | Wiz Blog

Wiz Research discovers CVE-2023-2640 & CVE-2023-32629, 2 privilege escalation vulnerabilities in Ubuntu's OverlayFS module impacting 40% of cloud workloads.