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RedHat: RHSA-2020-0839-01 Important Kernel-RT Security Fix Update

red hat
Calendar Grey March 17, 2020
Dist Redhat Esm H88
Red Hat's recent kernel-rt security update addresses critical vulnerabilities, enhancing both system integrity and real-time performance for essential applications
An update for kernel-rt is now available for Red Hat Enterprise Linux 7

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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)
* kernel: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel lacks a certain upper-bound check, leading to a buffer overflow (CVE-2019-17666)
* Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135) (CVE-2019-19338)
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):
* kernel-rt: update to the RHEL7.7.z batch#5 source tree (BZ#1794131)

Topics%20covered

Topics Covered

security advisory buffer overflow red hat kernel update bug fix important kernel-rt

References

https://access.redhat.com/security/cve/CVE-2019-11487 https://access.redhat.com/security/cve/CVE-2019-17666 https://access.redhat.com/security/cve/CVE-2019-19338 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/solutions/tsx-asynchronousabort

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-1062.18.1.rt56.1044.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1062.18.1.rt56.1044.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-debug-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-devel-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-trace-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1062.18.1.rt56.1044.el7.x86_64.rpm
Red Hat Enterprise Linux Realtime (v. 7):
Source:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:0839-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:0839
Issue date: 2020-03-17

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.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 buffer overflow red hat kernel update bug fix important kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux Realtime (v. 7) - noarch, x86_64

Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64

Bugs Fixed

1703063 - CVE-2019-11487 kernel: Count overflow in FUSE request leading to use-after-free issues.

1763690 - CVE-2019-17666 kernel: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel lacks a certain upper-bound check, leading to a buffer overflow

1781514 - CVE-2019-19338 Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135)

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