CVE-2016-6213
First published: Thu Jul 14 2016(Updated: )
fs/namespace.c in the Linux kernel before 4.9 does not restrict how many mounts may exist in a mount namespace, which allows local users to cause a denial of service (memory consumption and deadlock) via MS_BIND mount system calls, as demonstrated by a loop that triggers exponential growth in the number of mounts.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <=4.8.15 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.17-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d29216842a85c7970c536108e093963f02714498
- http://www.openwall.com/lists/oss-security/2016/07/13/8
- http://www.securityfocus.com/bid/91754
- https://access.redhat.com/errata/RHSA-2017:1842
- https://access.redhat.com/errata/RHSA-2017:2077
- https://bugzilla.redhat.com/show_bug.cgi?id=1356471
- https://github.com/torvalds/linux/commit/d29216842a85c7970c536108e093963f02714498
- https://launchpad.net/bugs/cve/CVE-2016-6213
- http://seclists.org/oss-sec/2016/q3/56
- http://seclists.org/oss-sec/2016/q3/65
- http://seclists.org/oss-sec/2016/q3/75
- https://lkml.org/lkml/2013/6/17/143
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1356472
- https://lkml.org/lkml/2013/6/20/709
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1356471#c6
- https://lkml.org/lkml/2016/8/28/269
- https://git.kernel.org/linus/d29216842a85c7970c536108e093963f02714498
- https://security-tracker.debian.org/tracker/CVE-2016-6213
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6213
- https://nvd.nist.gov/vuln/detail/CVE-2016-6213
- https://ubuntu.com/security/CVE-2016-6213
Frequently Asked Questions
What is CVE-2016-6213?
CVE-2016-6213 is a vulnerability in the Linux kernel that allows local users to cause a denial of service (memory consumption and deadlock) via MS_BIND mount system calls.
What is the severity of CVE-2016-6213?
The severity of CVE-2016-6213 is low.
How does CVE-2016-6213 affect Linux?
CVE-2016-6213 affects the Linux kernel versions before 4.9.
How can I fix CVE-2016-6213?
To fix CVE-2016-6213, update your Linux kernel to version 4.9 or later.
Where can I find more information about CVE-2016-6213?
You can find more information about CVE-2016-6213 at the following references: - [Reference 1](http://seclists.org/oss-sec/2016/q3/56) - [Reference 2](http://seclists.org/oss-sec/2016/q3/65) - [Reference 3](http://seclists.org/oss-sec/2016/q3/75)
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