CVE-2023-2640
Quick assessment
Affected
Canonical Ubuntu Kernel
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Canonical Ubuntu Linux是英国科能软件（Canonical）公司的一套Linux操作系统。 Canonical Ubuntu Linux存在安全漏洞，该漏洞源于内核中的OverlayFS没有执行权限检查，导致存在权限提升漏洞。
Public Exploits 1
Metasploit · 1
gameoverlay_privesc.rb#CVE-2023-2640 [exploit]
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2023-2640
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Canonical Ubuntu Linux 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Canonical Ubuntu Linux是英国科能软件（Canonical）公司的一套Linux操作系统。 Canonical Ubuntu Linux存在安全漏洞，该漏洞源于内核中的OverlayFS没有执行权限检查，导致存在权限提升漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Shenlong Deep Dive — AI Deep Analysis
10-question deep dive: root cause, exploitation, mitigation, urgency. Read summary free, full version requires login.
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Canonical | Ubuntu Kernel | - | - |
|
II. Public POCs for CVE-2023-2640
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | CVE-2023-2640 CVE-2023-32629 | https://github.com/OllaPapito/gameoverlay | POC Details |
| 2 | GameoverlayFS (CVE-2023-2640 and CVE-2023-32629) exploit in Shell Script tested on Ubuntu 20.04 Kernel 5.4.0 | https://github.com/luanoliveira350/GameOverlayFS | POC Details |
| 3 | GameOver(lay) Ubuntu Privilege Escalation | https://github.com/g1vi/CVE-2023-2640-CVE-2023-32629 | POC Details |
| 4 | None | https://github.com/vinetsuicide/CVE-2023-2640-CVE-2023-32629 | POC Details |
| 5 | Escalating Privilege using CVE-2023-2640 CVE-2023-3262 | https://github.com/SanjayRagavendar/Ubuntu-GameOver-Lay | POC Details |
| 6 | None | https://github.com/Nkipohcs/CVE-2023-2640-CVE-2023-32629 | POC Details |
| 7 | None | https://github.com/musorblyat/CVE-2023-2640-CVE-2023-32629 | POC Details |
| 8 | None | https://github.com/K5LK/CVE-2023-2640-32629 | POC Details |
| 9 | A local privilege escalation vulnerability has been discovered in the OverlayFS module of the Ubuntu kernel. This vulnerability could allow an attacker with local access to escalate their privileges, potentially gaining root-like access to the system. | https://github.com/projectdiscovery/nuclei-templates/blob/main/code/cves/2023/CVE-2023-2640.yaml | POC Details |
| 10 | Dimostrazione di una vulnerabilità RCE (Remote Code Execution) in phpMyAdmin 4.8.1, con exploit per reverse shell e analisi di privilege escalation tramite la vulnerabilità CVE-2023-2640/CVE-2023-32629 (GameOverlay) su kernel Linux. | https://github.com/filippo-zullo98/phpMyAdmin-RCE-Exploit-Lab | POC Details |
AI-Generated POC
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Vendor Advisories for CVE-2023-2640 (2)
-
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640 issue-tracking
-
https://ubuntu.com/security/notices/USN-6250-1 vendor-advisory
Mailing List Discussions for CVE-2023-2640 (1)
Security Blog Posts for CVE-2023-2640 (1)
-
https://wiz.io/blog/ubuntu-overlayfs-vulnerability technical-description
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V. Comments for CVE-2023-2640
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