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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
Linux Kernel xfsoverlay Rename Bugs Let Local Users Cause Denial of Service Conditions on the Target System
SecurityTracker Alert ID:  1036273
SecurityTracker URL:  http://securitytracker.com/id/1036273
CVE Reference:   CVE-2016-6197, CVE-2016-6198   (Links to External Site)
Date:  Jul 12 2016
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two vulnerabilities were reported in the Linux kernel. A local user can cause denial of service conditions on the target system.

A local user can invoke the rename() system call on an XFS file system to trigger a flaw in xfsoverlay and cause the kernel to crash.

A demonstration exploit is available at:

https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/syscalls/rename/rename13.c

Impact:   A local user can cause the target system to crash.
Solution:   The vendor has issued a fix (4.6).
Vendor URL:  www.kernel.org/ (Links to External Site)
Cause:   State error

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jul 30 2016 (Oracle Issues Fix for Oracle Linux) Linux Kernel xfsoverlay Rename Bugs Let Local Users Cause Denial of Service Conditions on the Target System
Oracle has issued a fix for Oracle Linux 6 and 7.
Aug 30 2016 (Ubuntu Issues Fix) Linux Kernel xfsoverlay Rename Bugs Let Local Users Cause Denial of Service Conditions on the Target System
Ubuntu has issued a fix for Ubuntu Linux 16.04 LTS.
Nov 4 2016 (Red Hat Issues Fix) Linux Kernel xfsoverlay Rename Bugs Let Local Users Cause Denial of Service Conditions on the Target System
Red Hat has issued a fix for Red Hat Enterprise Linux 7.



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