-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2018:2161-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:2161 Issue date: 2018-07-10 CVE Names: CVE-2018-3639 ==================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 7.3 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux ComputeNode EUS (v. 7.3) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3) - x86_64 Red Hat Enterprise Linux Server EUS (v. 7.3) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 7.3) - ppc64, ppc64le, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639, x86 AMD) Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue. Bug Fix(es): * When a Nonvolatile Memory Express (NVMe) namespace was created, changed, or deleted, an occasional deadlock occurred. With this update, namespace scanning and removal does not hold a mutual exclusion (mutex) program object. As a result, a deadlock no longer occurs in the described scenario. (BZ#1566886) * Previously, a live migration of a virtual machine from one host with updated firmware to another host without updated firmware resulted in incorrect kernel settings for Meltdown mitigations, which could leave the kernel vulnerable to Meltdown. With this fix, the firmware on the new physical host is re-scanned for updates after a live migration. As a result, the kernel uses the correct mitigation in the described scenario. (BZ#1570507) * Previously, microcode updates on 32 and 64-bit AMD and Intel architectures were not synchronized. As a consequence, it was not possible to apply the microcode updates. This fix adds the synchronization to the microcode updates so that processors of the stated architectures receive updates at the same time. As a result, microcode updates are now synchronized. (BZ#1578044) * When switching from the indirect branch speculation (IBRS) feature to the retpolines feature, the IBRS state of some CPUs was sometimes not handled correctly. Consequently, some CPUs were left with the IBRS Model-Specific Register (MSR) bit set to 1, which could lead to performance issues. With this update, the underlying source code has been fixed to clear the IBRS MSR bits correctly, thus fixing the bug. (BZ#1586146) Users of kernel are advised to upgrade to these updated packages, which fix these bugs. The system must be rebooted for this update to take effect. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1566890 - CVE-2018-3639 hw: cpu: speculative store bypass 6. Package List: Red Hat Enterprise Linux ComputeNode EUS (v. 7.3): Source: kernel-3.10.0-514.53.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-514.53.1.el7.noarch.rpm kernel-doc-3.10.0-514.53.1.el7.noarch.rpm x86_64: kernel-3.10.0-514.53.1.el7.x86_64.rpm kernel-debug-3.10.0-514.53.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.53.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.53.1.el7.x86_64.rpm kernel-devel-3.10.0-514.53.1.el7.x86_64.rpm kernel-headers-3.10.0-514.53.1.el7.x86_64.rpm kernel-tools-3.10.0-514.53.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.53.1.el7.x86_64.rpm perf-3.10.0-514.53.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm python-perf-3.10.0-514.53.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3): x86_64: kernel-debug-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.53.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.53.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 7.3): Source: kernel-3.10.0-514.53.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-514.53.1.el7.noarch.rpm kernel-doc-3.10.0-514.53.1.el7.noarch.rpm ppc64: kernel-3.10.0-514.53.1.el7.ppc64.rpm kernel-bootwrapper-3.10.0-514.53.1.el7.ppc64.rpm kernel-debug-3.10.0-514.53.1.el7.ppc64.rpm kernel-debug-debuginfo-3.10.0-514.53.1.el7.ppc64.rpm kernel-debug-devel-3.10.0-514.53.1.el7.ppc64.rpm kernel-debuginfo-3.10.0-514.53.1.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-514.53.1.el7.ppc64.rpm kernel-devel-3.10.0-514.53.1.el7.ppc64.rpm kernel-headers-3.10.0-514.53.1.el7.ppc64.rpm kernel-tools-3.10.0-514.53.1.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-514.53.1.el7.ppc64.rpm kernel-tools-libs-3.10.0-514.53.1.el7.ppc64.rpm perf-3.10.0-514.53.1.el7.ppc64.rpm perf-debuginfo-3.10.0-514.53.1.el7.ppc64.rpm python-perf-3.10.0-514.53.1.el7.ppc64.rpm python-perf-debuginfo-3.10.0-514.53.1.el7.ppc64.rpm ppc64le: kernel-3.10.0-514.53.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-514.53.1.el7.ppc64le.rpm kernel-debug-3.10.0-514.53.1.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-514.53.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-514.53.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-514.53.1.el7.ppc64le.rpm kernel-devel-3.10.0-514.53.1.el7.ppc64le.rpm kernel-headers-3.10.0-514.53.1.el7.ppc64le.rpm kernel-tools-3.10.0-514.53.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-514.53.1.el7.ppc64le.rpm kernel-tools-libs-3.10.0-514.53.1.el7.ppc64le.rpm perf-3.10.0-514.53.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-514.53.1.el7.ppc64le.rpm python-perf-3.10.0-514.53.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-514.53.1.el7.ppc64le.rpm s390x: kernel-3.10.0-514.53.1.el7.s390x.rpm kernel-debug-3.10.0-514.53.1.el7.s390x.rpm kernel-debug-debuginfo-3.10.0-514.53.1.el7.s390x.rpm kernel-debug-devel-3.10.0-514.53.1.el7.s390x.rpm kernel-debuginfo-3.10.0-514.53.1.el7.s390x.rpm kernel-debuginfo-common-s390x-3.10.0-514.53.1.el7.s390x.rpm kernel-devel-3.10.0-514.53.1.el7.s390x.rpm kernel-headers-3.10.0-514.53.1.el7.s390x.rpm kernel-kdump-3.10.0-514.53.1.el7.s390x.rpm kernel-kdump-debuginfo-3.10.0-514.53.1.el7.s390x.rpm kernel-kdump-devel-3.10.0-514.53.1.el7.s390x.rpm perf-3.10.0-514.53.1.el7.s390x.rpm perf-debuginfo-3.10.0-514.53.1.el7.s390x.rpm python-perf-3.10.0-514.53.1.el7.s390x.rpm python-perf-debuginfo-3.10.0-514.53.1.el7.s390x.rpm x86_64: kernel-3.10.0-514.53.1.el7.x86_64.rpm kernel-debug-3.10.0-514.53.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.53.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.53.1.el7.x86_64.rpm kernel-devel-3.10.0-514.53.1.el7.x86_64.rpm kernel-headers-3.10.0-514.53.1.el7.x86_64.rpm kernel-tools-3.10.0-514.53.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.53.1.el7.x86_64.rpm perf-3.10.0-514.53.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm python-perf-3.10.0-514.53.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 7.3): ppc64: kernel-debug-debuginfo-3.10.0-514.53.1.el7.ppc64.rpm kernel-debuginfo-3.10.0-514.53.1.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-514.53.1.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-514.53.1.el7.ppc64.rpm kernel-tools-libs-devel-3.10.0-514.53.1.el7.ppc64.rpm perf-debuginfo-3.10.0-514.53.1.el7.ppc64.rpm python-perf-debuginfo-3.10.0-514.53.1.el7.ppc64.rpm ppc64le: kernel-debug-debuginfo-3.10.0-514.53.1.el7.ppc64le.rpm kernel-debug-devel-3.10.0-514.53.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-514.53.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-514.53.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-514.53.1.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-514.53.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-514.53.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-514.53.1.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.53.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.53.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.53.1.el7.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2018-3639 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2018 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBW0Tt1NzjgjWX9erEAQjWjRAAqEnkLg83IXcDh/QVNDhAoM5gAh+OkfHJ LiuDz6CIHgDiv9K3BiG/dLNgL5caK11pxryqk/9kmtgoy6ClyqcrA2FNRIJMwugr PXTjAXNxekyn6gTX0I+8hSOulCZtkCRXmlUu79apvVT/eqQM6PfqjK02OjEL9uc8 59jO7ZoWcv7GVJhu+06QoHaWAqGHBOYL9ufCVAXZH6dY3aS2dPM4UUcZpVxsP8X/ HqXR/ciyXNPSQoGcR/waf/iZgx1pDIV6JXmdl/qlJXthohwa1ZwxD2qqEV3cM9uO XzXXVu9SD2D8cU4jClzIZ+XfM9J9dNl8j2YbZHaUs5IADNwqAIjPTb5leNhe6jqv omnbgOwkJ0mEOLeWBSpQhGxoq4rk4eUJLai1kcpw8MRa6RzOzTs+GHOxTpDfL681 S7F8GjN6J4l0gbW+fOkley3gdMi/74cZcWA6jX/GcjJrtzhlFhRsUDZqd8Eb+F/g quqdBLQ9Vc81FRlMoCATOhuqHM1/eJUcySbY3r1A6bU9oUQShN+prvIV4z5/ag6o WIPN2ImSDaSBACJoCSEby8e2jXs689JLHgPPS0QVvuMQK7wdYGu8/7W++L7+5/It IkS2XQFetG9urfkgM/OMVzeybOiGVsai+JAJOTxFnTWPeyIFF5MJ2E31Q11Amdlp YF80GD/Rvjo=ltf/ -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce