# CVE-2016-1576: The overlayfs implementation in the Linux kernel through 4.5.2 does not properly restrict the mount namespace, which allows local users to g

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2016-05-02 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The overlayfs implementation in the Linux kernel through 4.5.2 does not properly restrict the mount namespace, which allows local users to gain privileges by mounting an overlayfs filesystem on top of a FUSE filesystem, and then executing a crafted setuid program.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
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## Related

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

## References

- https://launchpadlibrarian.net/235300093/0005-overlayfs-Be-more-careful-about-copying-up-sxid-file.patch
- https://launchpadlibrarian.net/235300225/0006-overlayfs-Propogate-nosuid-from-lower-and-upper-moun.patch
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360
- https://bugs.launchpad.net/bugs/1535150
- http://www.openwall.com/lists/oss-security/2016/02/24/8
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1576.html
- http://www.halfdog.net/Security/2016/OverlayfsOverFusePrivilegeEscalation/
- http://www.openwall.com/lists/oss-security/2021/10/18/1
- https://www.exploit-db.com/exploits/41763

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