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RedHat Enterprise Linux 8: RHSA-2019:2741-01 Important: Kernel-RT DoS Risk

red hat
Calendar Grey September 11, 2019
Dist Redhat Esm H88
Crucial kernel-rt enhancement patch for CentOS highlights essential corrections and protective strategies.
An update for kernel-rt is now available for Red Hat Enterprise Linux 8

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: Heap overflow in mwifiex_update_bss_desc_with_ie function in marvell/mwifiex/scan.c (CVE-2019-3846)
* Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS (CVE-2019-3887)
* kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results (CVE-2019-9500)
* kernel: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)
* kernel: brcmfmac frame validation bypass (CVE-2019-9503)
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):
* BUG: scheduling while atomic in zswap (BZ#1726362)
* kernel-rt: update to the RHEL8.0.z batch#3 source tree (BZ#1734475)

Topics%20covered

Topics Covered

security advisory bug fix DoS Red Hat Enterprise Linux heap overflow kernel-rt

References

https://access.redhat.com/security/cve/CVE-2019-3846 https://access.redhat.com/security/cve/CVE-2019-3887 https://access.redhat.com/security/cve/CVE-2019-9500 https://access.redhat.com/security/cve/CVE-2019-9503 https://access.redhat.com/security/cve/CVE-2019-11487 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source: kernel-rt-4.18.0-80.11.1.rt9.156.el8_0.src.rpm
x86_64: kernel-rt-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-core-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-debug-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-debug-core-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-debug-devel-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-debug-kvm-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-debug-kvm-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-debug-modules-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-devel-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-kvm-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-kvm-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-modules-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm kernel-rt-modules-extra-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
Red Hat Enterprise Linux Real Time (v. 8):
Source: kernel-rt-4.18.0-80.11.1.rt9.156.el8_0.src.rpm
x86_64:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2741-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2741
Issue date: 2019-09-11

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.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 bug fix DoS Red Hat Enterprise Linux heap overflow kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux Real Time (v. 8) - x86_64

Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64

Bugs Fixed

1695044 - CVE-2019-3887 Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS

1701224 - CVE-2019-9500 kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results

1701842 - CVE-2019-9503 kernel: brcmfmac frame validation bypass

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

1713059 - CVE-2019-3846 kernel: Heap overflow in mwifiex_update_bss_desc_with_ie function in marvell/mwifiex/scan.c

1726362 - BUG: scheduling while atomic in zswap [rhel-8.0.0.z]

1734475 - kernel-rt: update to the RHEL8.0.z batch#3 source tree

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