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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2020:3222-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:3222
Issue date:        2020-07-29
CVE Names:         CVE-2019-19807 CVE-2019-20908 CVE-2020-10757
                   CVE-2020-10766 CVE-2020-10767 CVE-2020-10768
                   CVE-2020-12653 CVE-2020-12654 CVE-2020-12888
                   CVE-2020-15780
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 8.1
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 CodeReady Linux Builder EUS (v. 8.1) - aarch64, ppc64le, x86_64
Red Hat Enterprise Linux BaseOS EUS (v. 8.1) - aarch64, noarch, ppc64le, s390x, x86_64

3. Description:

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

Security Fix(es):

* kernel: use-after-free in sound/core/timer.c (CVE-2019-19807)

* kernel: kernel: DAX hugepages not considered during mremap
(CVE-2020-10757)

* kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug
allows an attacker to turn off the SSBD protection. (CVE-2020-10766)

* kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP
is unavailable or enhanced IBRS is available. (CVE-2020-10767)

* kernel: Indirect branch speculation can be enabled after it was
force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768)

* kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in
drivers/net/wireless/marvell/mwifiex/scan.c (CVE-2020-12653)

* kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function
in drivers/net/wireless/marvell/mwifiex/wmm.c (CVE-2020-12654)

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

* kernel: lockdown: bypass through ACPI write via efivar_ssdt
(CVE-2019-20908)

* kernel: lockdown: bypass through ACPI write via acpi_configfs
(CVE-2020-15780)

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):

* [DELL EMC 8.1 BUG] : Observing Multiple "hw csum failure" while
installing RHEL 8.1 on iSCSI LUN (BZ#1821374)

* kernel: provide infrastructure to support dual-signing of the kernel
(foundation to help address CVE-2020-10713) (BZ#1837432)

* deadlock between modprobe and netns exit (BZ#1845163)

* exit_boot failed when install RHEL8.1 (BZ#1846179)

* http request is taking more time for endpoint running on different host
via nodeport service (BZ#1847127)

* RHEL8.1 - s390/cio: fix virtio-ccw DMA without PV (BZ#1847534)

* RHEL8.1 - zEDC problems on z14 (genwqe/pci) (BZ#1847939)

* NVMe/FC with DM-MP unexpected I/O failure during "transitioning"
[EIOP-8345] (BZ#1854678)

* Backport conntrack race condition fixes (BZ#1854953)

* nf_conntrack module unload fail and refcount become to negative
(BZ#1854954)

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/):

1786078 - CVE-2019-19807 kernel: use-after-free in sound/core/timer.c
1831868 - CVE-2020-12653 kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c
1832530 - CVE-2020-12654 kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c
1836244 - CVE-2020-12888 Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario
1842525 - CVE-2020-10757 kernel: kernel: DAX hugepages not considered during mremap
1845840 - CVE-2020-10766 kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection.
1845867 - CVE-2020-10767 kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available.
1845868 - CVE-2020-10768 kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command.
1852942 - CVE-2019-20908 kernel: lockdown: bypass through ACPI write via efivar_ssdt
1852962 - CVE-2020-15780 kernel: lockdown: bypass through ACPI write via acpi_configfs

6. Package List:

Red Hat Enterprise Linux BaseOS EUS (v. 8.1):

Source:
kernel-4.18.0-147.24.2.el8_1.src.rpm

aarch64:
bpftool-4.18.0-147.24.2.el8_1.aarch64.rpm
bpftool-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-core-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-cross-headers-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debug-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debug-core-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debug-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debug-devel-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debug-modules-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debug-modules-extra-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-devel-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-headers-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-modules-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-modules-extra-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-tools-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-tools-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-tools-libs-4.18.0-147.24.2.el8_1.aarch64.rpm
perf-4.18.0-147.24.2.el8_1.aarch64.rpm
perf-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm
python3-perf-4.18.0-147.24.2.el8_1.aarch64.rpm
python3-perf-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm

noarch:
kernel-abi-whitelists-4.18.0-147.24.2.el8_1.noarch.rpm
kernel-doc-4.18.0-147.24.2.el8_1.noarch.rpm

ppc64le:
bpftool-4.18.0-147.24.2.el8_1.ppc64le.rpm
bpftool-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-core-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-cross-headers-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debug-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debug-core-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debug-devel-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debug-modules-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-devel-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-headers-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-modules-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-modules-extra-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-tools-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-tools-libs-4.18.0-147.24.2.el8_1.ppc64le.rpm
perf-4.18.0-147.24.2.el8_1.ppc64le.rpm
perf-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm
python3-perf-4.18.0-147.24.2.el8_1.ppc64le.rpm
python3-perf-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm

s390x:
bpftool-4.18.0-147.24.2.el8_1.s390x.rpm
bpftool-debuginfo-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-core-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-cross-headers-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-debug-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-debug-core-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-debug-debuginfo-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-debug-devel-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-debug-modules-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-debug-modules-extra-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-debuginfo-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-devel-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-headers-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-modules-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-modules-extra-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-tools-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-tools-debuginfo-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-zfcpdump-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-zfcpdump-core-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-zfcpdump-devel-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-zfcpdump-modules-4.18.0-147.24.2.el8_1.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-147.24.2.el8_1.s390x.rpm
perf-4.18.0-147.24.2.el8_1.s390x.rpm
perf-debuginfo-4.18.0-147.24.2.el8_1.s390x.rpm
python3-perf-4.18.0-147.24.2.el8_1.s390x.rpm
python3-perf-debuginfo-4.18.0-147.24.2.el8_1.s390x.rpm

x86_64:
bpftool-4.18.0-147.24.2.el8_1.x86_64.rpm
bpftool-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-core-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-cross-headers-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debug-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debug-core-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debug-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debug-devel-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debug-modules-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debug-modules-extra-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-devel-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-headers-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-modules-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-modules-extra-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-tools-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-tools-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-tools-libs-4.18.0-147.24.2.el8_1.x86_64.rpm
perf-4.18.0-147.24.2.el8_1.x86_64.rpm
perf-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm
python3-perf-4.18.0-147.24.2.el8_1.x86_64.rpm
python3-perf-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm

Red Hat CodeReady Linux Builder EUS (v. 8.1):

aarch64:
bpftool-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debug-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-tools-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm
kernel-tools-libs-devel-4.18.0-147.24.2.el8_1.aarch64.rpm
perf-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm
python3-perf-debuginfo-4.18.0-147.24.2.el8_1.aarch64.rpm

ppc64le:
bpftool-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-147.24.2.el8_1.ppc64le.rpm
perf-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm
python3-perf-debuginfo-4.18.0-147.24.2.el8_1.ppc64le.rpm

x86_64:
bpftool-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debug-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-tools-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm
kernel-tools-libs-devel-4.18.0-147.24.2.el8_1.x86_64.rpm
perf-debuginfo-4.18.0-147.24.2.el8_1.x86_64.rpm
python3-perf-debuginfo-4.18.0-147.24.2.el8_1.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-2019-19807
https://access.redhat.com/security/cve/CVE-2019-20908
https://access.redhat.com/security/cve/CVE-2020-10757
https://access.redhat.com/security/cve/CVE-2020-10766
https://access.redhat.com/security/cve/CVE-2020-10767
https://access.redhat.com/security/cve/CVE-2020-10768
https://access.redhat.com/security/cve/CVE-2020-12653
https://access.redhat.com/security/cve/CVE-2020-12654
https://access.redhat.com/security/cve/CVE-2020-12888
https://access.redhat.com/security/cve/CVE-2020-15780
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/grub2bootloader

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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