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Red Hat Security Advisory

Synopsis: Moderate: kernel security and bug fix update
Advisory ID: RHSA-2021:0019-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0019
Issue date: 2021-01-05
CVE Names: CVE-2018-20836 CVE-2019-15917 CVE-2019-20636
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.7
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. 7.7) – noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) – x86_64
Red Hat Enterprise Linux Server EUS (v. 7.7) – noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.7) – ppc64, ppc64le, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es):

* kernel: race condition in smp_task_timedout() and smp_task_done() in
drivers/scsi/libsas/sas_expander.c leads to use-after-free (CVE-2018-20836)

* kernel: use-after-free in drivers/bluetooth/hci_ldisc.c (CVE-2019-15917)

* kernel: out-of-bounds write via crafted keycode table (CVE-2019-20636)

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 – [ Brazos ] “Core(s) per socket” and “Socket” values are
interchanged in lscpu output. (kernel) (BZ#1879096)

* [DELL EMC 7.9 BUG] System crash when stressed using burnin stress tool
(BZ#1893994)

* [ Marvell 7.9] update qla2xxx driver with critical bug fixes (BZ#1895440)

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/):

1707796 – CVE-2018-20836 kernel: race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c leads to use-after-free
1760100 – CVE-2019-15917 kernel: use-after-free in drivers/bluetooth/hci_ldisc.c
1824059 – CVE-2019-20636 kernel: out-of-bounds write via crafted keycode table

6. Package List:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.7):

Source:
kernel-3.10.0-1062.43.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1062.43.1.el7.noarch.rpm
kernel-doc-3.10.0-1062.43.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-1062.43.1.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-debug-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-devel-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-headers-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-tools-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1062.43.1.el7.x86_64.rpm
perf-3.10.0-1062.43.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
python-perf-3.10.0-1062.43.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7):

x86_64:
bpftool-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1062.43.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.7):

Source:
kernel-3.10.0-1062.43.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1062.43.1.el7.noarch.rpm
kernel-doc-3.10.0-1062.43.1.el7.noarch.rpm

ppc64:
bpftool-3.10.0-1062.43.1.el7.ppc64.rpm
bpftool-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-debug-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-devel-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-headers-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-tools-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-1062.43.1.el7.ppc64.rpm
perf-3.10.0-1062.43.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
python-perf-3.10.0-1062.43.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm

ppc64le:
bpftool-3.10.0-1062.43.1.el7.ppc64le.rpm
bpftool-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-debug-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-devel-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-headers-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-tools-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-1062.43.1.el7.ppc64le.rpm
perf-3.10.0-1062.43.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
python-perf-3.10.0-1062.43.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm

s390x:
bpftool-3.10.0-1062.43.1.el7.s390x.rpm
bpftool-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm
kernel-3.10.0-1062.43.1.el7.s390x.rpm
kernel-debug-3.10.0-1062.43.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-1062.43.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-1062.43.1.el7.s390x.rpm
kernel-devel-3.10.0-1062.43.1.el7.s390x.rpm
kernel-headers-3.10.0-1062.43.1.el7.s390x.rpm
kernel-kdump-3.10.0-1062.43.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-1062.43.1.el7.s390x.rpm
perf-3.10.0-1062.43.1.el7.s390x.rpm
perf-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm
python-perf-3.10.0-1062.43.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 7.7):

ppc64:
bpftool-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-1062.43.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm

ppc64le:
bpftool-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-1062.43.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-1062.43.1.el7.ppc64le.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-2018-20836
https://access.redhat.com/security/cve/CVE-2019-15917
https://access.redhat.com/security/cve/CVE-2019-20636
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

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

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