CVE-2016-6213

Description

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.

Category

4.7
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2016/07/13/8 mailing list
https://github.com/torvalds/linux/commit/d29216842a85c7970c536108e093963f02714498 patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d29216842a85c7970c536108e093963f02714498 patch vendor advisory
http://www.securityfocus.com/bid/91754 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=1356471 issue tracking
https://access.redhat.com/errata/RHSA-2017:2077 vendor advisory
https://access.redhat.com/errata/RHSA-2017:1842 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-6213?
CVE-2016-6213 has been scored as a medium severity vulnerability.
How to fix CVE-2016-6213?
To fix CVE-2016-6213, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-6213 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-6213 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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