Red Hat Bugzilla – Bug 877393
CVE-2012-5514 kernel: xen: Broken error handling in guest_physmap_mark_populate_on_demand()
Last modified: 2013-08-24 10:03:38 EDT
guest_physmap_mark_populate_on_demand(), before carrying out its actual
operation, checks that the subject GFNs are not in use. If that check fails,
the code prints a message and bypasses the gfn_unlock() matching the
gfn_lock() carried out before entering the loop.
A malicious HVM guest administrator can cause Xen to hang.
Red Hat would like to thank the Xen project for reporting this issue.
This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.
This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.
Created xen tracking bugs for this issue
Affects: fedora-all [bug 883091]
xen-4.1.3-7.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
xen-4.1.3-6.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.