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

Synopsis:          Important: kernel-rt security and bug fix update
Advisory ID:       RHSA-2019:3089-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2019:3089
Issue date:        2019-10-16
CVE Names:         CVE-2018-20856 CVE-2019-3846 CVE-2019-9506 
                   CVE-2019-10126 
====================================================================
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: Use-after-free in __blk_drain_queue() function in
block/blk-core.c (CVE-2018-20856)

* kernel: Heap overflow in mwifiex_update_bss_desc_with_ie function in
marvell/mwifiex/scan.c (CVE-2019-3846)

* hardware: bluetooth: BR/EDR encryption key negotiation attacks (KNOB)
(CVE-2019-9506)

* kernel: Heap overflow in mwifiex_uap_parse_tail_ies function in
drivers/net/wireless/marvell/mwifiex/ie.c (CVE-2019-10126)

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):

* kernel-rt: update to the RHEL7.7.z batch#2 source tree (BZ#1748570)

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/):

1713059 - CVE-2019-3846 kernel: Heap overflow in mwifiex_update_bss_desc_with_ie function in marvell/mwifiex/scan.c
1716992 - CVE-2019-10126 kernel: Heap overflow in mwifiex_uap_parse_tail_ies function in drivers/net/wireless/marvell/mwifiex/ie.c
1727857 - CVE-2019-9506 hardware: bluetooth: BR/EDR encryption key negotiation attacks (KNOB)
1738705 - CVE-2018-20856 kernel: Use-after-free in __blk_drain_queue() function in block/blk-core.c
1748570 - kernel-rt: update to the RHEL7.7.z batch#2 source tree

6. Package List:

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

Source:
kernel-rt-3.10.0-1062.4.1.rt56.1027.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1062.4.1.rt56.1027.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm

Red Hat Enterprise Linux Realtime (v. 7):

Source:
kernel-rt-3.10.0-1062.4.1.rt56.1027.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1062.4.1.rt56.1027.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1062.4.1.rt56.1027.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1062.4.1.rt56.1027.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-2019-3846
https://access.redhat.com/security/cve/CVE-2019-9506
https://access.redhat.com/security/cve/CVE-2019-10126
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2019 Red Hat, Inc.
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