Xen, possibly before 4.0.2, allows local 64-bit PV guests to cause a denial of service (host crash) by specifying user mode execution without user-mode pagetables.
openSUSE 11.3 openSUSE 11.4 SLE SDK 10 SP4 for x86 SLE SDK 10 SP4 for X86-64 SUSE Linux Enterprise Desktop 10 SP4 for AMD64 and Intel EM64T SUSE Linux Enterprise Desktop 10 SP4 for x86 SUSE Linux Enterprise Desktop 11 SP1 SUSE Linux Enterprise SDK 10 SP3 SUSE Linux Enterprise Server 10 SP3 SUSE Linux Enterprise Server 10 SP4 for AMD64 and Intel EM64T SUSE Linux Enterprise Server 10 SP4 for x86 SUSE Linux Enterprise Server 11 SP1 SUSE Linux Enterprise Server 11 SP1-TERADATA SUSE Linux Enterprise Server for SAP 10 SP3 SUSE Linux Enterprise Server for SAP Applications 11 SP1-TERADATA SUSE Linux Enterprise Software Development Kit 11 SP1 SUSE Linux Enterprise Teradata 10 SP3 for AMD64 and Intel EM64T