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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2021:3447-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:3447
Issue date:        2021-09-07
CVE Names:         CVE-2021-37576 CVE-2021-38201
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 8.

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 (v. 8) - aarch64, ppc64le, x86_64
Red Hat Enterprise Linux BaseOS (v. 8) - 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: powerpc: KVM guest OS users can cause host OS memory corruption
(CVE-2021-37576)

* kernel: slab-out-of-bounds access in xdr_set_page_base() in
net/sunrpc/xdr.c (CVE-2021-38201)

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):

* Update Broadcom Emulex lpfc driver for RHEL8.5 with bug fixes
(BZ#1948608)

* cyclictest shows >50us latency when guest enters idle (RT guest with 18
RT vCPUs) (BZ#1981336)

* xfrm: backports from upstream (BZ#1981840)

* A task is stuck waiting for the completion of the vmci_resouce releasing
upon the balloon reset. (BZ#1982042)

* [mlx5] backport driver bits of  net: zero-initialize tc skb extension on
allocation (BZ#1982220)

* Kernel cannot kill a process doing compaction for hugepage allocation
(BZ#1984085)

* RHEL8.4 Nightly[0108] - [P10] [Regression] Kdump failed on RHEL8.4 on SAN
disk via flavafish adapter (qla2xxx/HPT/Radix) (BZ#1986156)

* [RHEL8.5] scheduler updates and fixes (BZ#1987296)

* RHEL 8.3 using FCOE via a FastLinQ QL45000 card will not manually scan in
LUN from Target_id's over 8 (BZ#1989097)

* fixes for oopses in security mitigation runtime code patching
(BZ#1989174)

* act mirred doesn't scrub packets when sending them to ingress
(BZ#1992226)

* HPE: Cannot install 8.4 using the DVD presented to the iLO (BZ#1993894)

* NFS client hangs on share listing when server side readdir verifiers are
implemented (BZ#1993895)

* SNO: The load is extremely high (~870) when pao is added and a profile is
applied. (BZ#1994879)

* timeout value of conntrack entry with TCP ESTABLISHED status is too short
(BZ#1995554)

* Increase the default value for flowtable offload timeouts (BZ#1995555)

* ice/iavf driver stop responding (BZ#1997534)

* [FJ8.4 Bug]: [REG] Some files in /proc/sys/user show wrong data
(BZ#1998002)

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/):

1986506 - CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory corruption
1992731 - CVE-2021-38201 kernel: slab-out-of-bounds access in xdr_set_page_base() in net/sunrpc/xdr.c

6. Package List:

Red Hat Enterprise Linux BaseOS (v. 8):

Source:
kernel-4.18.0-305.17.1.el8_4.src.rpm

aarch64:
bpftool-4.18.0-305.17.1.el8_4.aarch64.rpm
bpftool-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-core-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-cross-headers-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debug-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debug-core-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debug-devel-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debug-modules-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debug-modules-extra-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-devel-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-headers-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-modules-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-modules-extra-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-tools-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-tools-libs-4.18.0-305.17.1.el8_4.aarch64.rpm
perf-4.18.0-305.17.1.el8_4.aarch64.rpm
perf-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
python3-perf-4.18.0-305.17.1.el8_4.aarch64.rpm
python3-perf-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm

noarch:
kernel-abi-stablelists-4.18.0-305.17.1.el8_4.noarch.rpm
kernel-doc-4.18.0-305.17.1.el8_4.noarch.rpm

ppc64le:
bpftool-4.18.0-305.17.1.el8_4.ppc64le.rpm
bpftool-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-core-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-cross-headers-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debug-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debug-core-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debug-devel-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debug-modules-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-devel-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-headers-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-modules-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-modules-extra-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-tools-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-tools-libs-4.18.0-305.17.1.el8_4.ppc64le.rpm
perf-4.18.0-305.17.1.el8_4.ppc64le.rpm
perf-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
python3-perf-4.18.0-305.17.1.el8_4.ppc64le.rpm
python3-perf-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm

s390x:
bpftool-4.18.0-305.17.1.el8_4.s390x.rpm
bpftool-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-core-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-cross-headers-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-debug-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-debug-core-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-debug-devel-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-debug-modules-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-debug-modules-extra-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-devel-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-headers-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-modules-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-modules-extra-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-tools-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-zfcpdump-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-zfcpdump-core-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-zfcpdump-devel-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-zfcpdump-modules-4.18.0-305.17.1.el8_4.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-305.17.1.el8_4.s390x.rpm
perf-4.18.0-305.17.1.el8_4.s390x.rpm
perf-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
python3-perf-4.18.0-305.17.1.el8_4.s390x.rpm
python3-perf-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm

x86_64:
bpftool-4.18.0-305.17.1.el8_4.x86_64.rpm
bpftool-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-core-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-cross-headers-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debug-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debug-core-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debug-devel-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debug-modules-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debug-modules-extra-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-devel-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-headers-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-modules-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-modules-extra-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-tools-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-tools-libs-4.18.0-305.17.1.el8_4.x86_64.rpm
perf-4.18.0-305.17.1.el8_4.x86_64.rpm
perf-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
python3-perf-4.18.0-305.17.1.el8_4.x86_64.rpm
python3-perf-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm

Red Hat CodeReady Linux Builder (v. 8):

aarch64:
bpftool-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
kernel-tools-libs-devel-4.18.0-305.17.1.el8_4.aarch64.rpm
perf-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
python3-perf-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm

ppc64le:
bpftool-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-305.17.1.el8_4.ppc64le.rpm
perf-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
python3-perf-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm

x86_64:
bpftool-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
kernel-tools-libs-devel-4.18.0-305.17.1.el8_4.x86_64.rpm
perf-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
python3-perf-debuginfo-4.18.0-305.17.1.el8_4.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-2021-37576
https://access.redhat.com/security/cve/CVE-2021-38201
https://access.redhat.com/security/updates/classification/#important

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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