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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2020:2851-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:2851
Issue date:        2020-07-07
CVE Names:         CVE-2018-7191 CVE-2018-20169 CVE-2019-3901
                   CVE-2019-11487 CVE-2019-13233 CVE-2019-14821
                   CVE-2019-15916 CVE-2019-18660 CVE-2020-12888
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.6
Extended Update Support.

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 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

3. Description:

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

Security Fix(es):

* kernel: Count overflow in FUSE request leading to use-after-free issues.
(CVE-2019-11487)

* Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)

* Kernel: vfio: access to disabled MMIO space of some devices may lead to
DoS scenario (CVE-2020-12888)

* kernel: denial of service via ioctl call in network tun handling
(CVE-2018-7191)

* kernel: usb: missing size check in the __usb_get_extra_descriptor()
leading to DoS (CVE-2018-20169)

* kernel: perf_event_open() and execve() race in setuid programs allows a
data leak (CVE-2019-3901)

* kernel: use-after-free in arch/x86/lib/insn-eval.c (CVE-2019-13233)

* kernel: memory leak in register_queue_kobjects() in net/core/net-sysfs.c
leads to denial of service (CVE-2019-15916)

* kernel: powerpc: incomplete Spectre-RSB mitigation leads to information
exposure (CVE-2019-18660)

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: hw: provide reporting and microcode mitigation toggle for
CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1840677)

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/):

1660385 - CVE-2018-20169 kernel: usb: missing size check in the __usb_get_extra_descriptor() leading to DoS
1701245 - CVE-2019-3901 kernel: perf_event_open() and execve() race in setuid programs allows a data leak
1703063 - CVE-2019-11487 kernel: Count overflow in FUSE request leading to use-after-free issues.
1716328 - CVE-2018-7191 kernel: denial of service via ioctl call in network tun handling
1727756 - CVE-2019-13233 kernel: use-after-free in arch/x86/lib/insn-eval.c
1746708 - CVE-2019-14821 Kernel: KVM: OOB memory access via mmio ring buffer
1750813 - CVE-2019-15916 kernel: memory leak in register_queue_kobjects() in net/core/net-sysfs.c leads to denial of service
1777825 - CVE-2019-18660 kernel: powerpc: incomplete Spectre-RSB mitigation leads to information exposure
1836244 - CVE-2020-12888 Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario

6. Package List:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):

Source:
kernel-3.10.0-957.56.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.56.1.el7.noarch.rpm
kernel-doc-3.10.0-957.56.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.56.1.el7.x86_64.rpm
kernel-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.56.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.56.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.56.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.56.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.56.1.el7.x86_64.rpm
perf-3.10.0-957.56.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
python-perf-3.10.0-957.56.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm

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

x86_64:
kernel-debug-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.56.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.56.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.6):

Source:
kernel-3.10.0-957.56.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.56.1.el7.noarch.rpm
kernel-doc-3.10.0-957.56.1.el7.noarch.rpm

ppc64:
kernel-3.10.0-957.56.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-957.56.1.el7.ppc64.rpm
kernel-debug-3.10.0-957.56.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-957.56.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-957.56.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-957.56.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-957.56.1.el7.ppc64.rpm
kernel-devel-3.10.0-957.56.1.el7.ppc64.rpm
kernel-headers-3.10.0-957.56.1.el7.ppc64.rpm
kernel-tools-3.10.0-957.56.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-957.56.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-957.56.1.el7.ppc64.rpm
perf-3.10.0-957.56.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-957.56.1.el7.ppc64.rpm
python-perf-3.10.0-957.56.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-957.56.1.el7.ppc64.rpm

ppc64le:
kernel-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-debug-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-devel-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-headers-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-tools-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-957.56.1.el7.ppc64le.rpm
perf-3.10.0-957.56.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.56.1.el7.ppc64le.rpm
python-perf-3.10.0-957.56.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.56.1.el7.ppc64le.rpm

s390x:
kernel-3.10.0-957.56.1.el7.s390x.rpm
kernel-debug-3.10.0-957.56.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-957.56.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-957.56.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-957.56.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-957.56.1.el7.s390x.rpm
kernel-devel-3.10.0-957.56.1.el7.s390x.rpm
kernel-headers-3.10.0-957.56.1.el7.s390x.rpm
kernel-kdump-3.10.0-957.56.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-957.56.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-957.56.1.el7.s390x.rpm
perf-3.10.0-957.56.1.el7.s390x.rpm
perf-debuginfo-3.10.0-957.56.1.el7.s390x.rpm
python-perf-3.10.0-957.56.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-957.56.1.el7.s390x.rpm

x86_64:
bpftool-3.10.0-957.56.1.el7.x86_64.rpm
kernel-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.56.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.56.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.56.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.56.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.56.1.el7.x86_64.rpm
perf-3.10.0-957.56.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
python-perf-3.10.0-957.56.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 7.6):

ppc64:
kernel-debug-debuginfo-3.10.0-957.56.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-957.56.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-957.56.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-957.56.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-957.56.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-957.56.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-957.56.1.el7.ppc64.rpm

ppc64le:
kernel-debug-debuginfo-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.56.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-957.56.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.56.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.56.1.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.56.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.56.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.56.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.56.1.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-2018-7191
https://access.redhat.com/security/cve/CVE-2018-20169
https://access.redhat.com/security/cve/CVE-2019-3901
https://access.redhat.com/security/cve/CVE-2019-11487
https://access.redhat.com/security/cve/CVE-2019-13233
https://access.redhat.com/security/cve/CVE-2019-14821
https://access.redhat.com/security/cve/CVE-2019-15916
https://access.redhat.com/security/cve/CVE-2019-18660
https://access.redhat.com/security/cve/CVE-2020-12888
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/solutions/5142691

8. Contact:

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

Copyright 2020 Red Hat, Inc.
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