CVE-2013-1917

Xen 3.1 through 4.x, when running 64-bit hosts on Intel CPUs, does not clear the NT flag when using an IRET after a SYSENTER instruction, which allows PV guest users to cause a denial of service (hypervisor crash) by triggering a #GP fault, which is not properly handled by another IRET instruction.

Date published : 2013-05-13

http://www.debian.org/security/2012/dsa-2662

http://lists.fedoraproject.org/pipermail/package-announce/2013-May/104537.html