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

Synopsis: Moderate: kernel security and bug fix update
Advisory ID: RHSA-2021:0073-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0073
Issue date: 2021-01-12
CVE Names: CVE-2020-25641
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 8.2
Extended Update Support.

Red Hat Product Security has rated this update as having a security impact
of Moderate. 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. 8.2) – aarch64, ppc64le, x86_64
Red Hat Enterprise Linux BaseOS EUS (v. 8.2) – 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: soft-lockups in iov_iter_copy_from_user_atomic() could result in
DoS (CVE-2020-25641)

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):

* Please backport Jitter Entropy patches (BZ#1884682)

* Sometimes hit “error: kvm run failed Bad address” when launching a guest
on Power8 (BZ#1890883)

* [Intel 8.3 BUG] Unable to insert ‘i10nm_edac.ko’ EDAC kernel module on
JVL after CPU upgraded (BZ#1893330)

* RHEL8.1 – Random memory corruption may occur due to incorrect tlbflush
(BZ#1899209)

* RHEL8.1 Alpha – ISST-LTE:PNV:Witherspoon-DD2.3:woo: KDUMP hang during
shutdown, lpfc loses connection to disks (rootdisk:nvme) (BZ#1900101)

* pmtu of 1280 for vxlan as bridge port won’t work (BZ#1902083)

* Allocating domain failed for ehci-pci device (BZ#1902801)

* [Azure][RHEL8] IP forwarding issue in netvsc (BZ#1904326)

* pmtu not working with tunnels as bridge ports and br_netfilter loaded
(BZ#1907577)

* [Regression] RHEL8.2 – [kernel 148.el8] cpu (sys) time regression in SAP
HANA 2.0 benchmark benchInsertSubSelectPerformance (BZ#1908520)

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/):

1881424 – CVE-2020-25641 kernel: soft-lockups in iov_iter_copy_from_user_atomic() could result in DoS

6. Package List:

Red Hat Enterprise Linux BaseOS EUS (v. 8.2):

Source:
kernel-4.18.0-193.40.1.el8_2.src.rpm

aarch64:
bpftool-4.18.0-193.40.1.el8_2.aarch64.rpm
bpftool-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-core-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-cross-headers-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debug-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debug-core-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debug-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debug-devel-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debug-modules-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debug-modules-extra-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-devel-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-headers-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-modules-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-modules-extra-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-tools-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-tools-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-tools-libs-4.18.0-193.40.1.el8_2.aarch64.rpm
perf-4.18.0-193.40.1.el8_2.aarch64.rpm
perf-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm
python3-perf-4.18.0-193.40.1.el8_2.aarch64.rpm
python3-perf-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm

noarch:
kernel-abi-whitelists-4.18.0-193.40.1.el8_2.noarch.rpm
kernel-doc-4.18.0-193.40.1.el8_2.noarch.rpm

ppc64le:
bpftool-4.18.0-193.40.1.el8_2.ppc64le.rpm
bpftool-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-core-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-cross-headers-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debug-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debug-core-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debug-devel-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debug-modules-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-devel-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-headers-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-modules-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-modules-extra-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-tools-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-tools-libs-4.18.0-193.40.1.el8_2.ppc64le.rpm
perf-4.18.0-193.40.1.el8_2.ppc64le.rpm
perf-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm
python3-perf-4.18.0-193.40.1.el8_2.ppc64le.rpm
python3-perf-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm

s390x:
bpftool-4.18.0-193.40.1.el8_2.s390x.rpm
bpftool-debuginfo-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-core-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-cross-headers-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-debug-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-debug-core-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-debug-debuginfo-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-debug-devel-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-debug-modules-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-debug-modules-extra-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-debuginfo-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-devel-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-headers-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-modules-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-modules-extra-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-tools-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-tools-debuginfo-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-zfcpdump-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-zfcpdump-core-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-zfcpdump-devel-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-zfcpdump-modules-4.18.0-193.40.1.el8_2.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-193.40.1.el8_2.s390x.rpm
perf-4.18.0-193.40.1.el8_2.s390x.rpm
perf-debuginfo-4.18.0-193.40.1.el8_2.s390x.rpm
python3-perf-4.18.0-193.40.1.el8_2.s390x.rpm
python3-perf-debuginfo-4.18.0-193.40.1.el8_2.s390x.rpm

x86_64:
bpftool-4.18.0-193.40.1.el8_2.x86_64.rpm
bpftool-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-core-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-cross-headers-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debug-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debug-core-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debug-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debug-devel-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debug-modules-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debug-modules-extra-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-devel-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-headers-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-modules-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-modules-extra-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-tools-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-tools-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-tools-libs-4.18.0-193.40.1.el8_2.x86_64.rpm
perf-4.18.0-193.40.1.el8_2.x86_64.rpm
perf-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm
python3-perf-4.18.0-193.40.1.el8_2.x86_64.rpm
python3-perf-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm

Red Hat CodeReady Linux Builder EUS (v. 8.2):

aarch64:
bpftool-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debug-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-tools-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm
kernel-tools-libs-devel-4.18.0-193.40.1.el8_2.aarch64.rpm
perf-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm
python3-perf-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm

ppc64le:
bpftool-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-193.40.1.el8_2.ppc64le.rpm
perf-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm
python3-perf-debuginfo-4.18.0-193.40.1.el8_2.ppc64le.rpm

x86_64:
bpftool-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debug-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-tools-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm
kernel-tools-libs-devel-4.18.0-193.40.1.el8_2.x86_64.rpm
perf-debuginfo-4.18.0-193.40.1.el8_2.x86_64.rpm
python3-perf-debuginfo-4.18.0-193.40.1.el8_2.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-2020-25641
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2021 Red Hat, Inc.
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