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Tool Directory

CVE-2016-1576

HighPublished

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...

Published: May 2, 2016
Updated: Aug 5, 2024
Assigning CNA: canonical
Evidence observed: Nov 22, 2016

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

1.1%

Low · next 30 days

Percentile: 64.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

Ubuntu 15.10 - 'USERNS ' Overlayfs Over Fuse Privilege EscalationExploit
halfdog · linux · Nov 22, 2016

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