Vulnerability Report

CVE-2016-1576

Title: Canonical Ubuntu Touch Auth Bypass

Auth Bypass

Proof Of Concept

PoC Available for CVE-2016-1576

CWE Category NVD-CWE-noinfo
Published Date May 02, 2016
Modified Date Jun 17, 2026
Exploit Status Available
Score 7.8 CVSS v3.1
Exploit Probability (EPSS)
1.06%

Vulnerability Summary

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 gain privileges by mounting an overlayfs filesystem on top of a FUSE filesystem, and then executing a crafted setuid program.

Impacted Vendors

L
linux 1
U
ubuntu 2
C
canonical 3
U
ubports 1

Reference Links

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360 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/2016/02/24/8 http://www.openwall.com/lists/oss-security/2021/10/18/1 https://bugs.launchpad.net/bugs/1535150 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 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/2016/02/24/8 http://www.openwall.com/lists/oss-security/2021/10/18/1 https://bugs.launchpad.net/bugs/1535150 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
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.8
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity HIGH
7.2
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:L/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-1576 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/41763
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.