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RedHat Enterprise Linux 7.6 RHSA-2020:0664-01 Important: Kernel Security

red hat
Calendar Grey March 3, 2020
Dist Redhat Esm H88
Kernel update released for Red Hat Enterprise Linux classified as Important due to multiple security concerns. Addresses memory-related vulnerabilities.
An update for kernel is now available for Red Hat Enterprise Linux 7.6 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: Use-after-free in __blk_drain_queue() function in block/blk-core.c (CVE-2018-20856)
* 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: buffer overflow in cfg80211_mgd_wext_giwessid in net/wireless/wext-sme.c (CVE-2019-17133)
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):
* [PATCH] perf: Fix a race between ring_buffer_detach() and ring_buffer_wakeup() (BZ#1772826)
* core: backports from upstream (BZ#1780031)
* Race between tty_open() and flush_to_ldisc() using the tty_struct->driver_data field. (BZ#1780160)
* [Hyper-V][RHEL7.6]Hyper-V guest waiting indefinitely for RCU callback when removing a mem cgroup (BZ#1783176)
Enhancement(s):
* Selective backport: perf: Sync with upstream v4.16 (BZ#1782752)

Topics%20covered

Topics Covered

security advisory security update bug fix Red Hat Enterprise Linux important heap overflow kernel

References

https://access.redhat.com/security/cve/CVE-2018-20856 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-2019-17133 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):
Source: kernel-3.10.0-957.46.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.46.1.el7.noarch.rpm kernel-doc-3.10.0-957.46.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.46.1.el7.x86_64.rpm kernel-3.10.0-957.46.1.el7.x86_64.rpm kernel-debug-3.10.0-957.46.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.46.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.46.1.el7.x86_64.rpm kernel-devel-3.10.0-957.46.1.el7.x86_64.rpm kernel-headers-3.10.0-957.46.1.el7.x86_64.rpm kernel-tools-3.10.0-957.46.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.46.1.el7.x86_64.rpm perf-3.10.0-957.46.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm python-perf-3.10.0-957.46.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.46.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.46.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:0664-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:0664
Issue date: 2020-03-03

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security update bug fix Red Hat Enterprise Linux important heap overflow kernel

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.6) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - ppc64, ppc64le, x86_64

Bugs Fixed

1738705 - CVE-2018-20856 kernel: Use-after-free in __blk_drain_queue() function in block/blk-core.c

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

1774870 - CVE-2019-14895 kernel: heap-based buffer overflow in mwifiex_process_country_ie() function in drivers/net/wireless/marvell/mwifiex/sta_ioctl.c

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