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Red Hat Enterprise 7.7 RHSA-2021:0019-01 Moderate: Kernel Security Issues

red hat
Calendar Grey January 5, 2021
Dist Redhat Esm H88
The latest patch for Red Hat Enterprise Linux 7.7 resolves various kernel vulnerabilities and minor defects, assigned moderate severity classifications.
An update for kernel is now available for Red Hat Enterprise Linux 7.7 Extended Update Support

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.

Summary

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)

Topics%20covered

Topics Covered

security advisory moderate security issue update bug fix kernel security kernel Red Hat Enterprise red hat enterprise Moderate Severity use-after-free out-of-bounds write

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

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

Read the Full Advisory


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

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.7Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate security issue update bug fix kernel security kernel Red Hat Enterprise red hat enterprise Moderate Severity use-after-free out-of-bounds write

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

Bugs Fixed

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

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