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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen hugetlbfs Support Lets Local Users on a Guest System Cause Denial of Service Conditions on the Guest System
SecurityTracker Alert ID:  1035569
SecurityTracker URL:  http://securitytracker.com/id/1035569
CVE Reference:   CVE-2016-3961   (Links to External Site)
Date:  Apr 14 2016
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.5.x
Description:   A vulnerability was reported in Xen. A local user on the guest system can cause denial of service conditions on the guest system.

A local user on the guest system can run a specially crafted program that invokes hugetlbfs functions to trigger an infinite page fault loop and potentially cause the guest system to crash.

x86 Linux systems running as PV Xen guests are affected.

ARM systems are not affected.

x86 HVM guests are not affected.

Vitaly Kuznetsov from Red Hat reported this vulnerability.

Impact:   A local user on the guest system can cause the guest system to crash.
Solution:   The vendor has issued a fix (xsa174.patch).

The vendor's advisory is available at:

http://xenbits.xen.org/xsa/advisory-174.html

Vendor URL:  xenbits.xen.org/xsa/advisory-174.html (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Any)

Message History:   None.


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