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Red Hat Security Advisory

Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2020:0103-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:0103
Issue date: 2020-01-14
CVE Names: CVE-2018-10853 CVE-2018-18281 CVE-2018-20856
CVE-2019-6974 CVE-2019-11599
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.4
Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.4 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. 7.4) – noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.4) – noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) – x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.4) – ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.4) – x86_64
Red Hat Enterprise Linux Server TUS (v. 7.4) – noarch, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es):

* kernel: Use-after-free in __blk_drain_queue() function in
block/blk-core.c (CVE-2018-20856)

* Kernel: KVM: potential use-after-free via kvm_ioctl_create_device()
(CVE-2019-6974)

* kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853)

* kernel: TLB flush happens too late on mremap (CVE-2018-18281)

* kernel: fix race condition between mmget_not_zero()/get_task_mm() and
core dumping (CVE-2019-11599)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

Bug Fix(es):

* guest softlockup in mem_cgroup_reparent_charges with 800GB guests
(BZ#1770111)

* [RHEL7.7] Refined TSC clocksource calibration occasionally fails on some
SkyLake-X servers (BZ#1775682)

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/):

1589890 – CVE-2018-10853 kernel: kvm: guest userspace to guest kernel write
1645121 – CVE-2018-18281 kernel: TLB flush happens too late on mremap
1671913 – CVE-2019-6974 Kernel: KVM: potential use-after-free via kvm_ioctl_create_device()
1705937 – CVE-2019-11599 kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping
1738705 – CVE-2018-20856 kernel: Use-after-free in __blk_drain_queue() function in block/blk-core.c

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.4):

Source:
kernel-3.10.0-693.62.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-693.62.1.el7.noarch.rpm
kernel-doc-3.10.0-693.62.1.el7.noarch.rpm

x86_64:
kernel-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.62.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.62.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.62.1.el7.x86_64.rpm
perf-3.10.0-693.62.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
python-perf-3.10.0-693.62.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.4):

Source:
kernel-3.10.0-693.62.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-693.62.1.el7.noarch.rpm
kernel-doc-3.10.0-693.62.1.el7.noarch.rpm

ppc64le:
kernel-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-debug-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-devel-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-headers-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-tools-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-693.62.1.el7.ppc64le.rpm
perf-3.10.0-693.62.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-693.62.1.el7.ppc64le.rpm
python-perf-3.10.0-693.62.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-693.62.1.el7.ppc64le.rpm

x86_64:
kernel-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.62.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.62.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.62.1.el7.x86_64.rpm
perf-3.10.0-693.62.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
python-perf-3.10.0-693.62.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.4):

Source:
kernel-3.10.0-693.62.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-693.62.1.el7.noarch.rpm
kernel-doc-3.10.0-693.62.1.el7.noarch.rpm

x86_64:
kernel-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.62.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.62.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.62.1.el7.x86_64.rpm
perf-3.10.0-693.62.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
python-perf-3.10.0-693.62.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.4):

x86_64:
kernel-debug-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.62.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.4):

ppc64le:
kernel-debug-debuginfo-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-693.62.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-693.62.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-693.62.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-693.62.1.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.62.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.4):

x86_64:
kernel-debug-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.62.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.62.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.62.1.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-2018-10853
https://access.redhat.com/security/cve/CVE-2018-18281
https://access.redhat.com/security/cve/CVE-2018-20856
https://access.redhat.com/security/cve/CVE-2019-6974
https://access.redhat.com/security/cve/CVE-2019-11599
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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