Linux Kernel up to 4.8 Mount fs/namespace.c MS_BIND Mount System Calls resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as problematic, was found in Linux Kernel up to 4.8 (Operating System). Affected is an unknown part of the file fs/namespace.c of the component Mount Handler. The manipulation as part of a MS_BIND Mount System Calls leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability.

The bug was discovered 07/13/2016. The weakness was disclosed 12/28/2016 as confirmed git commit (GIT Repository). The advisory is shared for download at This vulnerability is traded as CVE-2016-6213 since 07/13/2016. The attack needs to be approached locally. A authentication is necessary for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 160 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 95995 (Ubuntu 16.04 LTS : linux vulnerabilities (USN-3161-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196658 (Ubuntu Security Notification for Linux Vulnerabilities (USN-3161-1)).

Upgrading to version 4.9 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (95995). The entries 87607, 93501, 93842 and 93844 are pretty similar.






  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
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Class: Resource consumption
CWE: CWE-400 / CWE-404
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Current Price Estimation: 🔍


Nessus ID: 95995
Nessus Name: Ubuntu 16.04 LTS : linux vulnerabilities (USN-3161-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
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OpenVAS ID: 860758
OpenVAS Name: Ubuntu Update for linux-lts-xenial USN-3161-2
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.9


07/13/2016 🔍
07/13/2016 +0 days 🔍
07/13/2016 +0 days 🔍
12/20/2016 +160 days 🔍
12/21/2016 +1 days 🔍
12/28/2016 +7 days 🔍
12/28/2016 +0 days 🔍
12/28/2016 +0 days 🔍
10/12/2022 +2114 days 🔍



Advisory: RHSA-2017:1842
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6213 (🔍)
SecurityFocus: 91754 - Linux Kernel CVE-2016-6213 Local Denial of Service Vulnerability

See also: 🔍


Created: 12/28/2016 04:10 PM
Updated: 10/12/2022 06:36 PM
Changes: 12/28/2016 04:10 PM (79), 07/24/2019 12:18 PM (6), 10/12/2022 06:36 PM (3)
Complete: 🔍


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