PT-2023-4062 · Canonical+2 · Ubuntu+2

Sagi Tzadik + 1 · Published 2023-06-06 · Updated 2026-06-16 · CVE-2023-32629

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Ubuntu kernels (affected versions not specified)

Description The issue is related to a local privilege escalation vulnerability in Ubuntu kernels, specifically in the overlayfs ovl copy up meta inode data function, which skips permission checks when calling ovl do setxattr. This allows an attacker to execute arbitrary code or cause a denial of service. The vulnerability has been exploited in real-world incidents to achieve easy root access.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

LPE

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

ALSA-2025_16880

BDU:2023-04360

CVE-2023-32629

LSN-0097-1

USN-6248-1

USN-6250-1

USN-6251-1

USN-6260-1

USN-6261-1

USN-6285-1

USN-8255-1

USN-8255-2

USN-8255-3

USN-8275-1

USN-8297-1

USN-8439-1

Affected Products

Astra Linux

Linuxmint

Ubuntu

References · 187

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/gameoverlay_privesc.rb · Exploit
• 🔥 https://github.com/ThrynSec/CVE-2023-32629-CVE-2023-2640---POC-Escalation · Exploit
• 🔥 https://github.com/kaotickj/Check-for-CVE-2023-32629-GameOver-lay · Exploit
• 🔥 https://github.com/k4but0/Ubuntu-LPE · Exploit
• 🔥 https://wiz.io/blog/ubuntu-overlayfs-vulnerability · Exploit
• https://ubuntu.com/security/CVE-2023-3609 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23098 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23003 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23001 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-6285-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68340 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-21106 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23093 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-3776 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23121 · Vendor Advisory