CVE-2011-2519 Information

Description

Xen in the Linux kernel when running a guest on a host without hardware assisted paging (HAP) allows guest users to cause a denial of service (invalid pointer dereference and hypervisor crash) via the SAHF instruction.

Reference

http://rhn.redhat.com/errata/RHSA-2011-1212.html http://www.openwall.com/lists/oss-security/2011/08/30/1 http://xenbits.xen.org/hg/xen-3.1-testing.hg/rev/15644 https://bugzilla.redhat.com/show_bug.cgi?id=718882