7.8 - RHSA-2019:2837

Problem Description:

An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support.

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 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

3. Description:

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)

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/):

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