Red Hat Bugzilla – Bug 851165
CVE-2012-3495 kernel: xen: hypercall physdev_get_free_pirq vulnerability
Last modified: 2015-11-06 11:19:48 EST
PHYSDEVOP_get_free_pirq does not check that its call to get_free_pirq succeeded, and if it fails will use the error code as an array index.
A malicious guest might be able to cause the host to crash, leading to a DoS, depending on the exact memory layout. Privilege escalation is a theoretical possibility which cannot be ruled out, but is considered unlikely
Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Matthew Daley as the original reporter.
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.
Now public via:
Created xen tracking bugs for this issue
Affects: fedora-all [bug 854589]
xen-4.1.3-2.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.