It was found that the Cirrus blit region checks were insufficient. A privileged guest user could use this flaw to to write outside of vram allocated buffer boundaries in the host's qemu process address space with attacker provided data. Acknowledgements: This issue was discovered by Paolo Bonzini of Red Hat.
Upstream patch submission: http://lists.gnu.org/archive/html/qemu-devel/2014-12/msg00508.html
Created qemu tracking bugs for this issue: Affects: fedora-all [bug 1170612]
Note that this really is an incorrect / incomplete CVE-2007-1320 (bug 237342) fix issue.
Statement: This issue affects the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6, a future update may address this flaw. This issue affects the kvm packages as shipped with Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This issue is currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
qemu-1.6.2-13.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2015:0349 https://rhn.redhat.com/errata/RHSA-2015-0349.html
This issue has been addressed in the following products: RHEV-H and Agents for RHEL-7 Via RHSA-2015:0624 https://rhn.redhat.com/errata/RHSA-2015-0624.html
This issue has been addressed in the following products: OpenStack 6 for RHEL 7 Via RHSA-2015:0643 https://rhn.redhat.com/errata/RHSA-2015-0643.html
This issue has been addressed in the following products: OpenStack 5 for RHEL 7 Via RHSA-2015:0795 https://rhn.redhat.com/errata/RHSA-2015-0795.html
This issue has been addressed in the following products: RHEV-H and Agents for RHEL-6 Via RHSA-2015:0868 https://rhn.redhat.com/errata/RHSA-2015-0868.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2015:0867 https://rhn.redhat.com/errata/RHSA-2015-0867.html
This issue has been addressed in the following products: OpenStack 5 for RHEL 6 OpenStack 4 for RHEL 6 Via RHSA-2015:0891 https://rhn.redhat.com/errata/RHSA-2015-0891.html