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

Synopsis:          Important: kernel-rt security and bug fix update
Advisory ID:       RHSA-2020:0375-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:0375
Issue date:        2020-02-04
CVE Names:         CVE-2019-14816 CVE-2019-14895 CVE-2019-14898 
                   CVE-2019-14901 CVE-2019-17133 
=====================================================================

1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

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 Realtime (v. 7) - noarch, x86_64
Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64

3. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables
fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* 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: heap overflow in marvell/mwifiex/tdls.c (CVE-2019-14901)

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

* kernel: incomplete fix  for race condition between
mmget_not_zero()/get_task_mm() and core dumping in CVE-2019-11599
(CVE-2019-14898)

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):

* patchset for x86/atomic: Fix smp_mb__{before,after}_atomic() [kernel-rt]
(BZ#1772522)

* kernel-rt: update to the RHEL7.7.z batch#4 source tree (BZ#1780322)

* kvm nx_huge_pages_recovery_ratio=0 is needed to meet KVM-RT low latency
requirement (BZ#1781157)

* kernel-rt:  hard lockup panic in during execution of CFS bandwidth period
timer (BZ#1788057)

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/):

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
1773519 - CVE-2019-14901 kernel: heap overflow in marvell/mwifiex/tdls.c
1774671 - CVE-2019-14898 kernel: incomplete fix  for race condition between mmget_not_zero()/get_task_mm() and core dumping in CVE-2019-11599
1774870 - CVE-2019-14895 kernel: heap-based buffer overflow in mwifiex_process_country_ie() function in drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
1781157 - kvm nx_huge_pages_recovery_ratio=0 is needed to meet KVM-RT low latency requirement [rhel-7.7.z]

6. Package List:

Red Hat Enterprise Linux for Real Time for NFV (v. 7):

Source:
kernel-rt-3.10.0-1062.12.1.rt56.1042.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1062.12.1.rt56.1042.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm

Red Hat Enterprise Linux Realtime (v. 7):

Source:
kernel-rt-3.10.0-1062.12.1.rt56.1042.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1062.12.1.rt56.1042.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1062.12.1.rt56.1042.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1062.12.1.rt56.1042.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-2019-14816
https://access.redhat.com/security/cve/CVE-2019-14895
https://access.redhat.com/security/cve/CVE-2019-14898
https://access.redhat.com/security/cve/CVE-2019-14901
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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