Issued:

2021-01-05

Updated:

2021-01-05

RHSA-2021:0019 - Moderate: kernel security and bug fix update

Synopsis

Moderate: kernel security and bug fix update

Type/Severity

Security Advisory Moderate

Topic

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.

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)

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.

Affected Products

Updated Packages

• kernel-devel-3.10.0-1062.43.1.el7.x86_64.rpm
• kernel-abi-whitelists-3.10.0-1062.43.1.el7.noarch.rpm
• kernel-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
• kernel-tools-3.10.0-1062.43.1.el7.x86_64.rpm
• perf-3.10.0-1062.43.1.el7.ppc64.rpm
• perf-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-tools-libs-3.10.0-1062.43.1.el7.x86_64.rpm
• bpftool-3.10.0-1062.43.1.el7.ppc64le.rpm
• kernel-tools-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
• kernel-debuginfo-common-s390x-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-debug-devel-3.10.0-1062.43.1.el7.ppc64le.rpm
• kernel-3.10.0-1062.43.1.el7.s390x.rpm
• bpftool-3.10.0-1062.43.1.el7.x86_64.rpm
• kernel-tools-libs-devel-3.10.0-1062.43.1.el7.x86_64.rpm
• kernel-tools-libs-3.10.0-1062.43.1.el7.ppc64le.rpm
• kernel-headers-3.10.0-1062.43.1.el7.x86_64.rpm
• python-perf-3.10.0-1062.43.1.el7.ppc64le.rpm
• bpftool-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
• bpftool-debuginfo-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
• python-perf-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
• kernel-headers-3.10.0-1062.43.1.el7.ppc64le.rpm
• kernel-tools-3.10.0-1062.43.1.el7.ppc64le.rpm
• kernel-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-headers-3.10.0-1062.43.1.el7.ppc64.rpm
• kernel-debug-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-debug-devel-3.10.0-1062.43.1.el7.ppc64.rpm
• kernel-debug-3.10.0-1062.43.1.el7.x86_64.rpm
• perf-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
• python-perf-3.10.0-1062.43.1.el7.x86_64.rpm
• kernel-3.10.0-1062.43.1.el7.x86_64.rpm
• python-perf-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
• kernel-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
• kernel-3.10.0-1062.43.1.el7.ppc64le.rpm
• bpftool-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-kdump-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-doc-3.10.0-1062.43.1.el7.noarch.rpm
• kernel-tools-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.x86_64.rpm
• kernel-3.10.0-1062.43.1.el7.src.rpm
• kernel-devel-3.10.0-1062.43.1.el7.ppc64.rpm
• kernel-kdump-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-devel-3.10.0-1062.43.1.el7.ppc64le.rpm
• perf-3.10.0-1062.43.1.el7.x86_64.rpm
• python-perf-3.10.0-1062.43.1.el7.s390x.rpm
• python-perf-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
• python-perf-3.10.0-1062.43.1.el7.ppc64.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
• bpftool-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
• kernel-debuginfo-common-ppc64-3.10.0-1062.43.1.el7.ppc64.rpm
• kernel-tools-debuginfo-3.10.0-1062.43.1.el7.ppc64le.rpm
• python-perf-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm
• perf-3.10.0-1062.43.1.el7.ppc64le.rpm
• perf-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
• kernel-bootwrapper-3.10.0-1062.43.1.el7.ppc64le.rpm
• kernel-tools-libs-3.10.0-1062.43.1.el7.ppc64.rpm
• bpftool-debuginfo-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-debug-3.10.0-1062.43.1.el7.ppc64.rpm
• perf-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-debuginfo-common-ppc64le-3.10.0-1062.43.1.el7.ppc64le.rpm
• kernel-tools-libs-devel-3.10.0-1062.43.1.el7.ppc64le.rpm
• kernel-debuginfo-common-x86_64-3.10.0-1062.43.1.el7.x86_64.rpm
• kernel-tools-libs-devel-3.10.0-1062.43.1.el7.ppc64.rpm
• kernel-3.10.0-1062.43.1.el7.ppc64.rpm
• kernel-debug-3.10.0-1062.43.1.el7.ppc64le.rpm
• kernel-devel-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-headers-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-tools-debuginfo-3.10.0-1062.43.1.el7.ppc64.rpm
• perf-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
• bpftool-3.10.0-1062.43.1.el7.ppc64.rpm
• kernel-debug-debuginfo-3.10.0-1062.43.1.el7.x86_64.rpm
• kernel-kdump-devel-3.10.0-1062.43.1.el7.s390x.rpm
• kernel-bootwrapper-3.10.0-1062.43.1.el7.ppc64.rpm

Fixes

• This content is not included.BZ - 1707796
• This content is not included.BZ - 1760100
• This content is not included.BZ - 1824059

CVEs

• CVE-2018-20836
• CVE-2019-15917
• CVE-2019-20636

References

• https://access.redhat.com/security/updates/classification/#moderate

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.