Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Oracle | Linux | 6 |
| Linux | Linux Kernel | <= 4.5.7 |
| Oracle | Vm Server | 3.4 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f371Issue TrackingPatch
- 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 ListThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.hThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmVendor 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/11f3710417d026ea2f4fcf362d866342c527418Issue TrackingPatch
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f371Issue TrackingPatch
FAQ
What is CVE-2016-6197?
CVE-2016-6197 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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, ...
How severe is CVE-2016-6197?
CVE-2016-6197 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-6197?
Check the references section above for vendor advisories and patch information. Affected products include: Oracle Linux, Linux Linux Kernel, Oracle Vm Server.