If a single descriptor crosses a region, the second chunk length should be decremented by size translated so far, instead it includes the full descriptor length. A privileged guest user could use this flaw to crash the host or, potentially, corrupt host memory. Upstream fix: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=bd97120fc3d1a11f3124c7c9ba1d91f51829eb85
Statement: This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 6. This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2013:0496 https://rhn.redhat.com/errata/RHSA-2013-0496.html
This issue has been addressed in following products: RHEV-H and Agents for RHEL-6 Via RHSA-2013:0579 https://rhn.redhat.com/errata/RHSA-2013-0579.html
This issue has been addressed in following products: Red Hat Enterprise Linux 6.2 EUS - Server Only Via RHSA-2013:0882 https://rhn.redhat.com/errata/RHSA-2013-0882.html
This issue has been addressed in following products: Red Hat Enterprise Linux 6.3 EUS - Server Only Via RHSA-2013:0928 https://rhn.redhat.com/errata/RHSA-2013-0928.html