6.9 - RHSA-2020:0179

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 Moderate. 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: kvm: guest userspace to guest kernel write (CVE-2018-10853)

* kernel: TLB flush happens too late on mremap (CVE-2018-18281)

* kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599)

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):

* RHEL 7.7 RC1 - Host crashes about 4.5 hours into switch port bounce test (BZ#1763623)

* [Azure][7.8] Include patch "PCI: hv: Avoid use of hv_pci_dev->pci_slot after freeing it" (BZ#1766088)

* [Hyper-V][RHEL7.8] When accelerated networking is enabled on RedHat, network interface(eth0) moved to new network namespace does not obtain IP address. (BZ#1766092)

* [Azure][RHEL 7.6] hv_vmbus probe pass-through GPU card failed (BZ#1766096)

* Since RHEL commit 5330f5d09820 high load can cause dm-multipath path failures (BZ#1770112)

* Hard lockup in free_one_page()->_raw_spin_lock() because sosreport command is reading from /proc/pagetypeinfo (BZ#1770731)

* [ESXi][RHEL7]use-after-free of scsi_cmnd on VMWare virtual guest with vmw_pvscsi and ata_piix (BZ#1770737)

* fix compat statfs64() returning EOVERFLOW for when _FILE_OFFSET_BITS=64 (BZ#1775677)

* Kernel experiences panic in update_group_power() due to division error (BZ#1775681)

* Guest crash after load cpuidle-haltpoll driver (BZ#1776288)

* Issues with nova/cinder and attaching disks, /dev/disk/by-id missing some times (BZ#1776291)

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/):

1589890 - CVE-2018-10853 kernel: kvm: guest userspace to guest kernel write 1645121 - CVE-2018-18281 kernel: TLB flush happens too late on mremap 1705937 - CVE-2019-11599 kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping