CVE ID:	CVE-2016-6197
Description:	fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2016-6197 BugTraq ID: 91709 http://www.securityfocus.com/bid/91709 http://www.openwall.com/lists/oss-security/2016/07/11/8 RedHat Security Advisories: RHSA-2016:1847 http://rhn.redhat.com/errata/RHSA-2016-1847.html RedHat Security Advisories: RHSA-2016:1875 http://rhn.redhat.com/errata/RHSA-2016-1875.html http://www.securitytracker.com/id/1036273 http://www.ubuntu.com/usn/USN-3070-1 http://www.ubuntu.com/usn/USN-3070-2 http://www.ubuntu.com/usn/USN-3070-3 http://www.ubuntu.com/usn/USN-3070-4