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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: kernel security, bug fix, and enhancement update
Advisory ID:       RHSA-2020:0664-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:0664
Issue date:        2020-03-03
CVE Names:         CVE-2018-20856 CVE-2019-14816 CVE-2019-14895 
                   CVE-2019-17133 
=====================================================================

1. Summary:

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: Use-after-free in __blk_drain_queue() function in
block/blk-core.c (CVE-2018-20856)

* kernel: heap overflow in mwifiex_update_vs_ie() function of Marvell WiFi
driver (CVE-2019-14816)

* kernel: heap-based buffer overflow in mwifiex_process_country_ie()
function in drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
(CVE-2019-14895)

* kernel: buffer overflow in cfg80211_mgd_wext_giwessid in
net/wireless/wext-sme.c (CVE-2019-17133)

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):

* [PATCH] perf: Fix a race between ring_buffer_detach() and
ring_buffer_wakeup() (BZ#1772826)

* core: backports from upstream (BZ#1780031)

* Race between tty_open() and flush_to_ldisc()  using the
tty_struct->driver_data field. (BZ#1780160)

* [Hyper-V][RHEL7.6]Hyper-V guest waiting indefinitely for RCU callback
when removing a mem cgroup (BZ#1783176)

Enhancement(s):

* Selective backport: perf: Sync with upstream v4.16 (BZ#1782752)

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/):

1738705 - CVE-2018-20856 kernel: Use-after-free in __blk_drain_queue() function
 in block/blk-core.c
1744149 - CVE-2019-14816 kernel: heap overflow in mwifiex_update_vs_ie()
 function of Marvell WiFi driver
1771909 - CVE-2019-17133 kernel: buffer overflow in cfg80211_mgd_wext_giwessid
 in net/wireless/wext-sme.c
1774870 - CVE-2019-14895 kernel: heap-based buffer overflow in
 mwifiex_process_country_ie() function in drivers/net/wireless/marvell/mwifiex/sta_ioctl.c

6. Package List:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):

Source:
kernel-3.10.0-957.46.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.46.1.el7.noarch.rpm
kernel-doc-3.10.0-957.46.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.46.1.el7.x86_64.rpm
kernel-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.46.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.46.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.46.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.46.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.46.1.el7.x86_64.rpm
perf-3.10.0-957.46.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
python-perf-3.10.0-957.46.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm

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

x86_64:
kernel-debug-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.46.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.46.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.6):

Source:
kernel-3.10.0-957.46.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.46.1.el7.noarch.rpm
kernel-doc-3.10.0-957.46.1.el7.noarch.rpm

ppc64:
kernel-3.10.0-957.46.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-957.46.1.el7.ppc64.rpm
kernel-debug-3.10.0-957.46.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-957.46.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-957.46.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-957.46.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-957.46.1.el7.ppc64.rpm
kernel-devel-3.10.0-957.46.1.el7.ppc64.rpm
kernel-headers-3.10.0-957.46.1.el7.ppc64.rpm
kernel-tools-3.10.0-957.46.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-957.46.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-957.46.1.el7.ppc64.rpm
perf-3.10.0-957.46.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-957.46.1.el7.ppc64.rpm
python-perf-3.10.0-957.46.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-957.46.1.el7.ppc64.rpm

ppc64le:
kernel-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-debug-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-devel-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-headers-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-tools-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-957.46.1.el7.ppc64le.rpm
perf-3.10.0-957.46.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.46.1.el7.ppc64le.rpm
python-perf-3.10.0-957.46.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.46.1.el7.ppc64le.rpm

s390x:
kernel-3.10.0-957.46.1.el7.s390x.rpm
kernel-debug-3.10.0-957.46.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-957.46.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-957.46.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-957.46.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-957.46.1.el7.s390x.rpm
kernel-devel-3.10.0-957.46.1.el7.s390x.rpm
kernel-headers-3.10.0-957.46.1.el7.s390x.rpm
kernel-kdump-3.10.0-957.46.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-957.46.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-957.46.1.el7.s390x.rpm
perf-3.10.0-957.46.1.el7.s390x.rpm
perf-debuginfo-3.10.0-957.46.1.el7.s390x.rpm
python-perf-3.10.0-957.46.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-957.46.1.el7.s390x.rpm

x86_64:
bpftool-3.10.0-957.46.1.el7.x86_64.rpm
kernel-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.46.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.46.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.46.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.46.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.46.1.el7.x86_64.rpm
perf-3.10.0-957.46.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
python-perf-3.10.0-957.46.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 7.6):

ppc64:
kernel-debug-debuginfo-3.10.0-957.46.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-957.46.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-957.46.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-957.46.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-957.46.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-957.46.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-957.46.1.el7.ppc64.rpm

ppc64le:
kernel-debug-debuginfo-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.46.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-957.46.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.46.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.46.1.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.46.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.46.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2018-20856
https://access.redhat.com/security/cve/CVE-2019-14816
https://access.redhat.com/security/cve/CVE-2019-14895
https://access.redhat.com/security/cve/CVE-2019-17133
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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