-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2018:2216-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:2216 Issue date: 2018-07-17 CVE Names: CVE-2018-3639 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 7.2 Advanced Update Support, Red Hat Enterprise Linux 7.2 Telco Extended Update Support, and Red Hat Enterprise Linux 7.2 Update Services for SAP Solutions. 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 Server AUS (v. 7.2) - noarch, x86_64 Red Hat Enterprise Linux Server E4S (v. 7.2) - noarch, ppc64le, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 7.2) - x86_64 Red Hat Enterprise Linux Server Optional E4S (v. 7.2) - ppc64le, x86_64 Red Hat Enterprise Linux Server Optional TUS (v. 7.2) - x86_64 Red Hat Enterprise Linux Server TUS (v. 7.2) - noarch, 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 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#1586145) 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 The system must be rebooted for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1566890 - CVE-2018-3639 hw: cpu: speculative store bypass 6. Package List: Red Hat Enterprise Linux Server AUS (v. 7.2): Source: kernel-3.10.0-327.71.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.71.1.el7.noarch.rpm kernel-doc-3.10.0-327.71.1.el7.noarch.rpm x86_64: kernel-3.10.0-327.71.1.el7.x86_64.rpm kernel-debug-3.10.0-327.71.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.1.el7.x86_64.rpm kernel-devel-3.10.0-327.71.1.el7.x86_64.rpm kernel-headers-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.71.1.el7.x86_64.rpm perf-3.10.0-327.71.1.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm python-perf-3.10.0-327.71.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm Red Hat Enterprise Linux Server E4S (v. 7.2): Source: kernel-3.10.0-327.71.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.71.1.el7.noarch.rpm kernel-doc-3.10.0-327.71.1.el7.noarch.rpm ppc64le: kernel-3.10.0-327.71.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-327.71.1.el7.ppc64le.rpm kernel-debug-3.10.0-327.71.1.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-327.71.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-327.71.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-327.71.1.el7.ppc64le.rpm kernel-devel-3.10.0-327.71.1.el7.ppc64le.rpm kernel-headers-3.10.0-327.71.1.el7.ppc64le.rpm kernel-tools-3.10.0-327.71.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-327.71.1.el7.ppc64le.rpm kernel-tools-libs-3.10.0-327.71.1.el7.ppc64le.rpm perf-3.10.0-327.71.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-327.71.1.el7.ppc64le.rpm python-perf-3.10.0-327.71.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-327.71.1.el7.ppc64le.rpm x86_64: kernel-3.10.0-327.71.1.el7.x86_64.rpm kernel-debug-3.10.0-327.71.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.1.el7.x86_64.rpm kernel-devel-3.10.0-327.71.1.el7.x86_64.rpm kernel-headers-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.71.1.el7.x86_64.rpm perf-3.10.0-327.71.1.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm python-perf-3.10.0-327.71.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 7.2): Source: kernel-3.10.0-327.71.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.71.1.el7.noarch.rpm kernel-doc-3.10.0-327.71.1.el7.noarch.rpm x86_64: kernel-3.10.0-327.71.1.el7.x86_64.rpm kernel-debug-3.10.0-327.71.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.1.el7.x86_64.rpm kernel-devel-3.10.0-327.71.1.el7.x86_64.rpm kernel-headers-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.71.1.el7.x86_64.rpm perf-3.10.0-327.71.1.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm python-perf-3.10.0-327.71.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 7.2): x86_64: kernel-debug-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.71.1.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional E4S (v. 7.2): ppc64le: kernel-debug-debuginfo-3.10.0-327.71.1.el7.ppc64le.rpm kernel-debug-devel-3.10.0-327.71.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-327.71.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-327.71.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-327.71.1.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-327.71.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-327.71.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-327.71.1.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.71.1.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional TUS (v. 7.2): x86_64: kernel-debug-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.71.1.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.1.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 https://access.redhat.com/security/vulnerabilities/ssbd 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 iQIVAwUBW04DTdzjgjWX9erEAQhwsxAAi4kK8IDd0gszT0tXVkEvawSFtgCOevBW LfMipHUt5T05F57v8/C+8jBPst2qv5z+8izHWL83tiNN/y2uwQnVOp7i/MvQ8SgH cG1ogA8YUjKH3U/CUauCnhB0YHr91O9HW0JSc2iep8ygg8+6WgiMdb6J3/qP+syk zVXObjgAFICskg9GzialWUwElflOqyPbUNClk/tfubw4aDHx47Im920kZv1y8ju1 SpYZXfo9/h909skeTKg+RxJ3gVumVHlCMLzAiLJ4/TSjzB/Z7k4+zanyUnkk4hYl sHguzsVGVqwh379mzO2JMiBvwbBpApi41X5/159DRTUY+HWISo8lqG29CgS/MuOa 50wZw0w1FcNAqMbf3A9plW0c1F6lF59lyyljOFSxxcuJR5O5Jj0aV4WrAVgkXGxk dxkWlwvXFJjXymf3gO2H2a7ZiJOVePGlXoUBeu1WXZpiYa1bX5odu4YQpDvq953d luq3fNhmk0uxQNixVf4PdtZcFkZUCETbSgAeTDzrKG9BsVBfQ2kNYLkkeaVaOSOy FlKJEe7d8zKf6/qc6bk984N61TGUKXzLdC85uj7gSyb+whWe4w+VuB51PgSI43iM EmZwc3+Iw/7re7V0J4TGicgq7H2xQL6jOlIBvFhwdF8B4lZkCofmxJf0/viyQ3OF Nbl+RI7FgpQ= =RNzj -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce