CVE-2016-6197

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.

• CWE-20

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185Issue Tracking, Patch
• http://rhn.redhat.com/errata/RHSA-2016-1847.html
• http://rhn.redhat.com/errata/RHSA-2016-1875.html
• http://www.openwall.com/lists/oss-security/2016/07/11/8Mailing List, Third Party Advisory
• http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlThird Party Advisory
• http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
• http://www.securityfocus.com/bid/91709
• 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
• https://bugzilla.redhat.com/show_bug.cgi?id=1355650Issue Tracking
• https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185Issue Tracking, Patch
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185Issue Tracking, Patch
• http://rhn.redhat.com/errata/RHSA-2016-1847.html
• http://rhn.redhat.com/errata/RHSA-2016-1875.html
• http://www.openwall.com/lists/oss-security/2016/07/11/8Mailing List, Third Party Advisory
• http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlThird Party Advisory
• http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
• http://www.securityfocus.com/bid/91709
• 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
• https://bugzilla.redhat.com/show_bug.cgi?id=1355650Issue Tracking
• https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185Issue Tracking, Patch

Published

Aug 6, 2016

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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