Red Hat Bugzilla – Bug 870101
CVE-2012-4537 kernel: xen: Memory mapping failure can crash Xen
Last modified: 2015-02-16 10:51:47 EST
When set_p2m_entry fails, Xen's internal data structures (the p2m and m2p tables) can get out of sync. This failure can be triggered by unusual guest behaviour exhausting the memory reserved for the p2m table. If it happens, subsequent guest-invoked memory operations can cause Xen to fail an assertion and crash.
A malicious HVM guest administrator might be able to cause Xen to crash.
Red Hat would like to thank the Xen project for reporting this issue.
This issue did 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 876203]
xen-4.1.3-4.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.
xen-4.1.3-6.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
xen-4.2.0-4.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in following products:
Red Hat Enterprise Linux 5
Via RHSA-2012:1540 https://rhn.redhat.com/errata/RHSA-2012-1540.html