Security update for the Linux Kernel SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2018:1377-2 Final 1 1 2018-10-18T12:45:05Z current 2018-10-18T12:45:05Z 2018-10-18T12:45:05Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel The SUSE Linux Enterprise 12 SP2 LTSS kernel was updated to receive various security and bugfixes. The following security bug was fixed: - CVE-2018-3639: Information leaks using 'Memory Disambiguation' feature in modern CPUs were mitigated, aka 'Spectre Variant 4' (bnc#1087082). A new boot commandline option was introduced, 'spec_store_bypass_disable', which can have following values: - auto: Kernel detects whether your CPU model contains an implementation of Speculative Store Bypass and picks the most appropriate mitigation. - on: disable Speculative Store Bypass - off: enable Speculative Store Bypass - prctl: Control Speculative Store Bypass per thread via prctl. Speculative Store Bypass is enabled for a process by default. The state of the control is inherited on fork. - seccomp: Same as 'prctl' above, but all seccomp threads will disable SSB unless they explicitly opt out. The default is 'seccomp', meaning programs need explicit opt-in into the mitigation. Status can be queried via the /sys/devices/system/cpu/vulnerabilities/spec_store_bypass file, containing: - 'Vulnerable' - 'Mitigation: Speculative Store Bypass disabled' - 'Mitigation: Speculative Store Bypass disabled via prctl' - 'Mitigation: Speculative Store Bypass disabled via prctl and seccomp' The following related and non-security bugs were fixed: - cpuid: Fix cpuid.edx.7.0 propagation to guest - ext4: Fix hole length detection in ext4_ind_map_blocks() (bsc#1090953). - ibmvnic: Clean actual number of RX or TX pools (bsc#1092289). - kvm: Introduce nopvspin kernel parameter (bsc#1056427). - kvm: Fix nopvspin static branch init usage (bsc#1056427). - powerpc/64: Use barrier_nospec in syscall entry (bsc#1068032, bsc#1080157). - powerpc/64s: Add barrier_nospec (bsc#1068032, bsc#1080157). - powerpc/64s: Add support for ori barrier_nospec patching (bsc#1068032, bsc#1080157). - powerpc/64s: Enable barrier_nospec based on firmware settings (bsc#1068032, bsc#1080157). - powerpc/64s: Enhance the information in cpu_show_meltdown() (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/64s: Enhance the information in cpu_show_spectre_v1() (bsc#1068032). - powerpc/64s: Fix section mismatch warnings from setup_rfi_flush() (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/64s: Move cpu_show_meltdown() (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/64s: Patch barrier_nospec in modules (bsc#1068032, bsc#1080157). - powerpc/64s: Wire up cpu_show_spectre_v1() (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/64s: Wire up cpu_show_spectre_v2() (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/powernv: Set or clear security feature flags (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/powernv: Use the security flags in pnv_setup_rfi_flush() (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/pseries: Add new H_GET_CPU_CHARACTERISTICS flags (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/pseries: Fix clearing of security feature flags (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/pseries: Restore default security feature flags on setup (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/pseries: Set or clear security feature flags (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/pseries: Use the security flags in pseries_setup_rfi_flush() (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/rfi-flush: Always enable fallback flush on pseries (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/rfi-flush: Differentiate enabled and patched flush types (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc: Add security feature flags for Spectre/Meltdown (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc: Move default security feature flags (bsc#1068032, bsc#1075087, bsc#1091041). - powerpc: Use barrier_nospec in copy_from_user() (bsc#1068032, bsc#1080157). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-SLE-SERVER-12-SP2-BCL-2018-956 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2018/suse-su-20181377-2/ Link for SUSE-SU-2018:1377-2 https://lists.suse.com/pipermail/sle-security-updates/2018-October/004726.html E-Mail link for SUSE-SU-2018:1377-2 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1056427 SUSE Bug 1056427 https://bugzilla.suse.com/1068032 SUSE Bug 1068032 https://bugzilla.suse.com/1075087 SUSE Bug 1075087 https://bugzilla.suse.com/1080157 SUSE Bug 1080157 https://bugzilla.suse.com/1087082 SUSE Bug 1087082 https://bugzilla.suse.com/1090953 SUSE Bug 1090953 https://bugzilla.suse.com/1091041 SUSE Bug 1091041 https://bugzilla.suse.com/1092289 SUSE Bug 1092289 https://bugzilla.suse.com/1093215 SUSE Bug 1093215 https://bugzilla.suse.com/1094019 SUSE Bug 1094019 https://www.suse.com/security/cve/CVE-2018-3639/ SUSE CVE CVE-2018-3639 page SUSE Linux Enterprise Server 12 SP2-BCL kernel-default-4.4.121-92.80.1 kernel-default-base-4.4.121-92.80.1 kernel-default-devel-4.4.121-92.80.1 kernel-devel-4.4.121-92.80.1 kernel-macros-4.4.121-92.80.1 kernel-source-4.4.121-92.80.1 kernel-syms-4.4.121-92.80.1 kgraft-patch-4_4_121-92_80-default-1-3.5.2 kernel-default-4.4.121-92.80.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL kernel-default-base-4.4.121-92.80.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL kernel-default-devel-4.4.121-92.80.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL kernel-devel-4.4.121-92.80.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL kernel-macros-4.4.121-92.80.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL kernel-source-4.4.121-92.80.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL kernel-syms-4.4.121-92.80.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL kgraft-patch-4_4_121-92_80-default-1-3.5.2 as a component of SUSE Linux Enterprise Server 12 SP2-BCL Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4. CVE-2018-3639 SUSE Linux Enterprise Server 12 SP2-BCL:kernel-default-4.4.121-92.80.1 SUSE Linux Enterprise Server 12 SP2-BCL:kernel-default-base-4.4.121-92.80.1 SUSE Linux Enterprise Server 12 SP2-BCL:kernel-default-devel-4.4.121-92.80.1 SUSE Linux Enterprise Server 12 SP2-BCL:kernel-devel-4.4.121-92.80.1 SUSE Linux Enterprise Server 12 SP2-BCL:kernel-macros-4.4.121-92.80.1 SUSE Linux Enterprise Server 12 SP2-BCL:kernel-source-4.4.121-92.80.1 SUSE Linux Enterprise Server 12 SP2-BCL:kernel-syms-4.4.121-92.80.1 SUSE Linux Enterprise Server 12 SP2-BCL:kgraft-patch-4_4_121-92_80-default-1-3.5.2 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2018/suse-su-20181377-2/ https://www.suse.com/security/cve/CVE-2018-3639.html CVE-2018-3639 https://bugzilla.suse.com/1074701 SUSE Bug 1074701 https://bugzilla.suse.com/1085235 SUSE Bug 1085235 https://bugzilla.suse.com/1085308 SUSE Bug 1085308 https://bugzilla.suse.com/1087078 SUSE Bug 1087078 https://bugzilla.suse.com/1087082 SUSE Bug 1087082 https://bugzilla.suse.com/1092631 SUSE Bug 1092631 https://bugzilla.suse.com/1092885 SUSE Bug 1092885 https://bugzilla.suse.com/1094912 SUSE Bug 1094912 https://bugzilla.suse.com/1098813 SUSE Bug 1098813 https://bugzilla.suse.com/1100394 SUSE Bug 1100394 https://bugzilla.suse.com/1102640 SUSE Bug 1102640 https://bugzilla.suse.com/1105412 SUSE Bug 1105412 https://bugzilla.suse.com/1111963 SUSE Bug 1111963 https://bugzilla.suse.com/1172781 SUSE Bug 1172781 https://bugzilla.suse.com/1172782 SUSE Bug 1172782 https://bugzilla.suse.com/1172783 SUSE Bug 1172783 https://bugzilla.suse.com/1173489 SUSE Bug 1173489 https://bugzilla.suse.com/1178658 SUSE Bug 1178658 https://bugzilla.suse.com/1201877 SUSE Bug 1201877 https://bugzilla.suse.com/1215674 SUSE Bug 1215674