The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel before 3.18.5, when the guest OS lacks SYSENTER MSR initialization, allows guest OS users to gain guest OS privileges or cause a denial of service (guest OS crash) by triggering use of a 16-bit code segment for emulation of a SYSENTER instruction.
SUSE CaaS Platform 4.5 SUSE Enterprise Storage 7 SUSE Linux Enterprise Desktop 12 SP1 SUSE Linux Enterprise Desktop 15 SP3 SUSE Linux Enterprise Desktop 15 SP4 SUSE Linux Enterprise High Performance Computing 15 SP3 SUSE Linux Enterprise High Performance Computing 15 SP4 SUSE Linux Enterprise Micro 5.3 SUSE Linux Enterprise Module for Basesystem 15 SP3 SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE Linux Enterprise Module for Development Tools 15 SP3 SUSE Linux Enterprise Module for Development Tools 15 SP4 SUSE Linux Enterprise Module for Public Cloud 15 SP3 SUSE Linux Enterprise Module for Public Cloud 15 SP4 SUSE Linux Enterprise Real Time 15 SP2 SUSE Linux Enterprise Server 11 SP3-TERADATA SUSE Linux Enterprise Server 12 SP1 SUSE Linux Enterprise Server 15 SP3 SUSE Linux Enterprise Server 15 SP4 SUSE Linux Enterprise Server for SAP Applications 11 SP3-TERADATA SUSE Linux Enterprise Server for SAP Applications 15 SP2 SUSE Linux Enterprise Server for SAP Applications 15 SP3 SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Linux Enterprise Storage 7.1 SUSE Manager Proxy 4.1 SUSE Manager Proxy 4.2 SUSE Manager Proxy 4.3 SUSE Manager Retail Branch Server 4.1 SUSE Manager Retail Branch Server 4.2 SUSE Manager Retail Branch Server 4.3 SUSE Manager Server 4.1 SUSE Manager Server 4.2 SUSE Manager Server 4.3