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Red Hat Security Advisory

Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2020:2667-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:2667
Issue date: 2020-06-23
CVE Names: CVE-2020-12657
=====================================================================

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 block/bfq-iosched.c related to
bfq_idle_slice_timer_body (CVE-2020-12657)

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):

* [FJ8.2 Bug]: kernel: retrieving process core dump of the init process
(PID 1) fails (BZ#1821377)

* Stand-alone CPU Linpack test reports bad residual on HPC Cluster node(s)
while running RHEL 8 (BZ#1827618)

* missing version.h dependency for modpost may cause build to fail
(BZ#1828228)

* RHEL8.2 Pre-Beta – net/ibmvnic: Fix typo in retry check (BZ#1828708)

* efi: kernel panic during ltp fs test – read_all -d /sys -q -r 10
(BZ#1829526)

* RHEL8.2 Beta – SMC-R connection with vlan-id fails (BZ#1830895)

* RHEL8.1 – RHEL8.1 kernel
4.18.0-147.3.1.el8.bz181950_test001.ppc64le+debug failed during LPM test
(p8/p9):idahop08:LPM (vtpm) (BZ#1831663)

* s390/pci: fix bugs related to MIO instruction usage (BZ#1834690)

* RHEL8.2 Alpha – ISST-LTE:PowerVM: vNIC DLPAR crashes the LPAR (ibmvnic)
(BZ#1836232)

* kernel: hw: provide reporting and microcode mitigation toggle for
CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1840685)

* [Hyper-V][RHEL8.2] Update netvsc driver (BZ#1842485)

* block layer: update to v5.3 (BZ#1842872)

* netfilter: backports from upstream (BZ#1845041)

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/):

1832866 – CVE-2020-12657 kernel: use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body

6. Package List:

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

Source:
kernel-4.18.0-147.20.1.el8_1.src.rpm

aarch64:
bpftool-4.18.0-147.20.1.el8_1.aarch64.rpm
bpftool-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-core-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-cross-headers-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debug-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debug-core-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debug-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debug-devel-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debug-modules-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debug-modules-extra-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-devel-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-headers-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-modules-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-modules-extra-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-tools-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-tools-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-tools-libs-4.18.0-147.20.1.el8_1.aarch64.rpm
perf-4.18.0-147.20.1.el8_1.aarch64.rpm
perf-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm
python3-perf-4.18.0-147.20.1.el8_1.aarch64.rpm
python3-perf-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm

noarch:
kernel-abi-whitelists-4.18.0-147.20.1.el8_1.noarch.rpm
kernel-doc-4.18.0-147.20.1.el8_1.noarch.rpm

ppc64le:
bpftool-4.18.0-147.20.1.el8_1.ppc64le.rpm
bpftool-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-core-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-cross-headers-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debug-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debug-core-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debug-devel-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debug-modules-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-devel-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-headers-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-modules-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-modules-extra-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-tools-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-tools-libs-4.18.0-147.20.1.el8_1.ppc64le.rpm
perf-4.18.0-147.20.1.el8_1.ppc64le.rpm
perf-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm
python3-perf-4.18.0-147.20.1.el8_1.ppc64le.rpm
python3-perf-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm

s390x:
bpftool-4.18.0-147.20.1.el8_1.s390x.rpm
bpftool-debuginfo-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-core-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-cross-headers-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-debug-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-debug-core-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-debug-debuginfo-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-debug-devel-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-debug-modules-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-debug-modules-extra-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-debuginfo-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-devel-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-headers-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-modules-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-modules-extra-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-tools-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-tools-debuginfo-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-zfcpdump-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-zfcpdump-core-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-zfcpdump-devel-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-zfcpdump-modules-4.18.0-147.20.1.el8_1.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-147.20.1.el8_1.s390x.rpm
perf-4.18.0-147.20.1.el8_1.s390x.rpm
perf-debuginfo-4.18.0-147.20.1.el8_1.s390x.rpm
python3-perf-4.18.0-147.20.1.el8_1.s390x.rpm
python3-perf-debuginfo-4.18.0-147.20.1.el8_1.s390x.rpm

x86_64:
bpftool-4.18.0-147.20.1.el8_1.x86_64.rpm
bpftool-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-core-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-cross-headers-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debug-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debug-core-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debug-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debug-devel-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debug-modules-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debug-modules-extra-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-devel-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-headers-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-modules-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-modules-extra-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-tools-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-tools-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-tools-libs-4.18.0-147.20.1.el8_1.x86_64.rpm
perf-4.18.0-147.20.1.el8_1.x86_64.rpm
perf-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm
python3-perf-4.18.0-147.20.1.el8_1.x86_64.rpm
python3-perf-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm

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

aarch64:
bpftool-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debug-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-tools-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm
kernel-tools-libs-devel-4.18.0-147.20.1.el8_1.aarch64.rpm
perf-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm
python3-perf-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm

ppc64le:
bpftool-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-147.20.1.el8_1.ppc64le.rpm
perf-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm
python3-perf-debuginfo-4.18.0-147.20.1.el8_1.ppc64le.rpm

x86_64:
bpftool-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debug-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-tools-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm
kernel-tools-libs-devel-4.18.0-147.20.1.el8_1.x86_64.rpm
perf-debuginfo-4.18.0-147.20.1.el8_1.x86_64.rpm
python3-perf-debuginfo-4.18.0-147.20.1.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-2020-12657
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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