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Red Hat Security Advisory
Synopsis: Important: kernel-alt security and bug fix update
Advisory ID: RHSA-2018:1967-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:1967
Issue date: 2018-06-26
CVE Names: CVE-2018-3639
=====================================================================
1. Summary:
An update for kernel-alt is now available for Red Hat Enterprise Linux 7.
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 for ARM and IBM Power LE (POWER9) Server (v. 7) – aarch64, noarch, ppc64le, s390x
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) – aarch64, noarch, ppc64le
3. Description:
The kernel-alt packages provide the Linux kernel version 4.x.
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, PowerPC)
* This release also includes next iteration of the CVE-2017-5715 mitigation
that includes the SMCCC (Secure Monitor Call Calling Convention) 1.1
support. (CVE-2017-5715, ARM)
Red Hat would like to thank Google Project Zero for reporting CVE-2017-5715
and Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google
Project Zero) for reporting CVE-2018-3639.
Bug Fix(es):
These updated kernel-alt packages include numerous bug fixes. Space
precludes documenting all of the bug fixes in this advisory. See the
descriptions in the related Knowledge Article:
https://access.redhat.com/articles/3485851
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/):
1519780 – CVE-2017-5715 hw: cpu: speculative execution branch target injection
1566890 – CVE-2018-3639 hw: cpu: speculative store bypass
6. Package List:
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source:
kernel-alt-4.14.0-49.8.1.el7a.src.rpm
aarch64:
kernel-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-debug-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-debug-debuginfo-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-debug-devel-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-debuginfo-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-devel-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-headers-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-tools-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-tools-libs-4.14.0-49.8.1.el7a.aarch64.rpm
perf-4.14.0-49.8.1.el7a.aarch64.rpm
perf-debuginfo-4.14.0-49.8.1.el7a.aarch64.rpm
python-perf-4.14.0-49.8.1.el7a.aarch64.rpm
python-perf-debuginfo-4.14.0-49.8.1.el7a.aarch64.rpm
noarch:
kernel-abi-whitelists-4.14.0-49.8.1.el7a.noarch.rpm
kernel-doc-4.14.0-49.8.1.el7a.noarch.rpm
ppc64le:
kernel-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-bootwrapper-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-debug-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-debug-debuginfo-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-debuginfo-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-devel-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-headers-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-tools-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-tools-libs-4.14.0-49.8.1.el7a.ppc64le.rpm
perf-4.14.0-49.8.1.el7a.ppc64le.rpm
perf-debuginfo-4.14.0-49.8.1.el7a.ppc64le.rpm
python-perf-4.14.0-49.8.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.14.0-49.8.1.el7a.ppc64le.rpm
s390x:
kernel-4.14.0-49.8.1.el7a.s390x.rpm
kernel-debug-4.14.0-49.8.1.el7a.s390x.rpm
kernel-debug-debuginfo-4.14.0-49.8.1.el7a.s390x.rpm
kernel-debug-devel-4.14.0-49.8.1.el7a.s390x.rpm
kernel-debuginfo-4.14.0-49.8.1.el7a.s390x.rpm
kernel-debuginfo-common-s390x-4.14.0-49.8.1.el7a.s390x.rpm
kernel-devel-4.14.0-49.8.1.el7a.s390x.rpm
kernel-headers-4.14.0-49.8.1.el7a.s390x.rpm
kernel-kdump-4.14.0-49.8.1.el7a.s390x.rpm
kernel-kdump-debuginfo-4.14.0-49.8.1.el7a.s390x.rpm
kernel-kdump-devel-4.14.0-49.8.1.el7a.s390x.rpm
perf-4.14.0-49.8.1.el7a.s390x.rpm
perf-debuginfo-4.14.0-49.8.1.el7a.s390x.rpm
python-perf-4.14.0-49.8.1.el7a.s390x.rpm
python-perf-debuginfo-4.14.0-49.8.1.el7a.s390x.rpm
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7):
aarch64:
kernel-debug-debuginfo-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-debuginfo-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.14.0-49.8.1.el7a.aarch64.rpm
kernel-tools-libs-devel-4.14.0-49.8.1.el7a.aarch64.rpm
perf-debuginfo-4.14.0-49.8.1.el7a.aarch64.rpm
python-perf-debuginfo-4.14.0-49.8.1.el7a.aarch64.rpm
noarch:
kernel-doc-4.14.0-49.8.1.el7a.noarch.rpm
ppc64le:
kernel-debug-debuginfo-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-debug-devel-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-debuginfo-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.14.0-49.8.1.el7a.ppc64le.rpm
kernel-tools-libs-devel-4.14.0-49.8.1.el7a.ppc64le.rpm
perf-debuginfo-4.14.0-49.8.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.14.0-49.8.1.el7a.ppc64le.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/cve/CVE-2018-3639
https://access.redhat.com/security/cve/CVE-2017-5715
https://access.redhat.com/articles/3485851
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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