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RedHat: RHSA-2020-0103-01 Important: Kernel Security Fix and Update

red hat
Calendar Grey January 14, 2020
Dist Redhat Esm H88
Critical kernel security and bug fix update released for Red Hat Enterprise Linux 7.4 addressing various CVE vulnerabilities.
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 L...

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.

Summary

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)

Topics%20covered

Topics Covered

security advisory kernel update bug fix security fix Red Hat Enterprise Linux x86_64 Important severity

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

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

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.4Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.4 Update Services for SAPSolutions.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory kernel update bug fix security fix Red Hat Enterprise Linux x86_64 Important severity

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

Bugs Fixed

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

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