(RHSA-2019:2837) Important: kernel security and bug fix update

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• hpsa driver hard lockup trying to complete a no longer valid completion on the stack (BZ#1731980)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)