CVE-2016-6198

Public Exploit

Description

The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.03%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory oracle.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html vendor advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html third party advisory
http://rhn.redhat.com/errata/RHSA-2016-1847.html vendor advisory
https://github.com/torvalds/linux/commit/9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca issue tracking patch
http://rhn.redhat.com/errata/RHSA-2016-2584.html vendor advisory
http://www.securityfocus.com/bid/91709 vdb entry
http://rhn.redhat.com/errata/RHSA-2016-1875.html vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-2574.html vendor advisory
http://www.securitytracker.com/id/1036273 vdb entry
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca issue tracking patch
https://github.com/torvalds/linux/commit/54d5ca871e72f2bb172ec9323497f01cd5091ec7 issue tracking patch
http://www.openwall.com/lists/oss-security/2016/07/11/8 mailing list exploit third party advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5 release notes
https://bugzilla.redhat.com/show_bug.cgi?id=1355654 issue tracking
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d5ca871e72f2bb172ec9323497f01cd5091ec7 issue tracking patch

Frequently Asked Questions

What is the severity of CVE-2016-6198?
CVE-2016-6198 has been scored as a medium severity vulnerability.
How to fix CVE-2016-6198?
To fix CVE-2016-6198, 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-2016-6198 being actively exploited in the wild?
It is possible that CVE-2016-6198 is being exploited or will be exploited in a near future based on public information. 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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