CVE ID:	CVE-2010-4255
Description:	The fixup_page_fault function in arch/x86/traps.c in Xen 4.0.1 and earlier on 64-bit platforms, when paravirtualization is enabled, does not verify that kernel mode is used to call the handle_gdt_ldt_mapping_fault function, which allows guest OS users to cause a denial of service (host OS BUG_ON) via a crafted memory access.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2010-4255 20111013 VMSA-2011-0012 VMware ESXi and ESX updates to third party libraries and ESX Service Console http://www.securityfocus.com/archive/1/520102/100/0/threaded 42884 http://secunia.com/advisories/42884 46397 http://secunia.com/advisories/46397 RHSA-2011:0017 http://www.redhat.com/support/errata/RHSA-2011-0017.html [oss-security] 20101130 CVE request: xen: x86-64: don't crash Xen upon direct pv guest access http://openwall.com/lists/oss-security/2010/11/30/5 [oss-security] 20101130 Re: CVE request: xen: x86-64: don't crash Xen upon direct pv guest access http://openwall.com/lists/oss-security/2010/11/30/8 [xen-devel] 20101129 [PATCH] x86-64: don't crash Xen upon direct pv guest access http://lists.xensource.com/archives/html/xen-devel/2010-11/msg01650.html http://www.vmware.com/security/advisories/VMSA-2011-0012.html http://www.vmware.com/security/advisories/VMSA-2011-0012.html https://bugzilla.redhat.com/show_bug.cgi?id=658155 https://bugzilla.redhat.com/show_bug.cgi?id=658155