Vulnerability CVE-2016-6198
Published: 2016-08-06

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.

Type:

CWE-284

 (Improper Access Control)

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.9/10
6.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Oracle -> Vm server 
Oracle -> Linux 
Linux -> Linux kernel 

 References:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d5ca871e72f2bb172ec9323497f01cd5091ec7
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca
http://rhn.redhat.com/errata/RHSA-2016-1847.html
http://rhn.redhat.com/errata/RHSA-2016-1875.html
http://rhn.redhat.com/errata/RHSA-2016-2574.html
http://rhn.redhat.com/errata/RHSA-2016-2584.html
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
http://www.openwall.com/lists/oss-security/2016/07/11/8
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.securityfocus.com/bid/91709
http://www.securitytracker.com/id/1036273
https://bugzilla.redhat.com/show_bug.cgi?id=1355654
https://github.com/torvalds/linux/commit/54d5ca871e72f2bb172ec9323497f01cd5091ec7
https://github.com/torvalds/linux/commit/9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca
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