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Red Hat Enterprise Linux 7.6 RHSA-2019-2837-01 Important Kernel Fix

red hat
Calendar Grey September 20, 2019
Dist Redhat Esm H88
Red Hat Enterprise Linux now has a kernel security patch and bug resolution update. Key vulnerabilities mitigated with this release.
An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support

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: page cache side channel attacks (CVE-2019-5489)
* kernel: a NULL pointer dereference in drivers/scsi/megaraid/megaraid_sas_base.c leading to DoS (CVE-2019-11810)
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):
* [RHEL7.7] Refined TSC clocksource calibration occasionally fails on some SkyLake-X servers (BZ#1719781)
* tc: incorrect flows statistic on bond device (shared block) (BZ#1719786)
* Qlogic qla2xxx driver version 10.x.x.x pins all irq requests to cpu0 and associated cores (BZ#1720956)
* libceph: handle an empty authorize reply (BZ#1722769)
* RHEL7.6 - pkey: Indicate old mkvp only if old and curr. mkvp are different (BZ#1723153)
* RHEL7.6 - qdio: clear intparm during shutdown (BZ#1723154)
* [RHEL7] Fix Spectre V1 vulnerability in vhost code (BZ#1724079)
* [Stratus] 802.3ad bond group member disabled after reboot (or I/O failure testing) (BZ#1725037)
* Accept validate negotiate if server returns NT_STATUS_NOT_SUPPORTED. (BZ#1726563)
* [Regression] RHEL7.6 - losing dirty bit during THP splitting, possible memory corruption (mm-) (BZ#1727108)
* [Intel 7.7 BUG] BUG: unable to handle kernel paging request at 000000006b4fd010 (BZ#1727110)
* KVM tracebacks causing significant latency to VM (BZ#1728174)
* NULL pointer dereference in vxlan_dellink+0xaa (BZ#1728198)
* [rhel7]NULL pointer dereference at vxlan_fill_metadata_dst (BZ#1728199)
* After update to RHEL 7.6 (3.10.0-957.1.3.el7.x86_64) from 7.4, customer has experienced multiple panics in kernel at BUG at drivers/iommu/iova.c:859! (BZ#1731300)
* kernel build: speed up debuginfo extraction (BZ#1731464)
* hpsa driver hard lockup trying to complete a no longer valid completion on the stack (BZ#1731980)
* XFS: forced shutdown in xfs_trans_cancel during create near ENOSPC (BZ#1731982)
* TCP packets are segmented when sent to the VLAN device when coming from VXLAN dev. (BZ#1732812)
* panic handing smb2_reconnect due to a use after free (BZ#1737381)
* Backport TCP follow-up for small buffers (BZ#1739129)

Topics%20covered

Topics Covered

security advisory DoS Red Hat Enterprise Linux important kernel bug fixes page cache attack

References

https://access.redhat.com/security/cve/CVE-2019-5489 https://access.redhat.com/security/cve/CVE-2019-11810 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):
Source: kernel-3.10.0-957.35.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.35.1.el7.noarch.rpm kernel-doc-3.10.0-957.35.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.35.1.el7.x86_64.rpm kernel-3.10.0-957.35.1.el7.x86_64.rpm kernel-debug-3.10.0-957.35.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.35.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.35.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.35.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.35.1.el7.x86_64.rpm kernel-devel-3.10.0-957.35.1.el7.x86_64.rpm kernel-headers-3.10.0-957.35.1.el7.x86_64.rpm kernel-tools-3.10.0-957.35.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.35.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.35.1.el7.x86_64.rpm perf-3.10.0-957.35.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.35.1.el7.x86_64.rpm python-perf-3.10.0-957.35.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.35.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.35.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.35.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.35.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.35.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2837-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2837
Issue date: 2019-09-20

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6Extended Update Support.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 DoS Red Hat Enterprise Linux important kernel bug fixes page cache attack

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.6) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - ppc64, ppc64le, x86_64

Bugs Fixed

1664110 - CVE-2019-5489 Kernel: page cache side channel attacks

1709164 - CVE-2019-11810 kernel: a NULL pointer dereference in drivers/scsi/megaraid/megaraid_sas_base.c leading to DoS

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