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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2021:2168-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:2168
Issue date:        2021-06-01
CVE Names:         CVE-2021-3501 CVE-2021-3543
====================================================================
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: userspace applications can misuse the KVM API to cause a write of
16 bytes at an offset up to 32 GB from vcpu->run (CVE-2021-3501)

* kernel: nitro_enclaves stale file descriptors on failed usercopy
(CVE-2021-3543)

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):

* OVS mistakenly using local IP as tun_dst for VXLAN packets (?)
(BZ#1944667)

* Selinux: The task calling security_set_bools() deadlocks with itself when
it later calls  selinux_audit_rule_match(). (BZ#1945123)

* [mlx5] tc flower mpls match options does not work (BZ#1952061)

* mlx5: missing patches for ct.rel (BZ#1952062)

* CT HWOL: with OVN/OVS, intermittently, load balancer hairpin TCP packets
get dropped for seconds in a row (BZ#1952065)

* [Lenovo 8.3 bug] Blackscreen after clicking on "Settings" icon from
top-right corner. (BZ#1952900)

* RHEL 8.x missing uio upstream fix. (BZ#1952952)

* Turbostat doesn't show any measured data on AMD Milan (BZ#1952987)

* P620 no sound from front headset jack (BZ#1954545)

* RHEL kernel 8.2 and higher are affected by data corruption bug in raid1
arrays using bitmaps. (BZ#1955188)

* [net/sched] connection failed with DNAT + SNAT by tc action ct
(BZ#1956458)

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/):

1950136 - CVE-2021-3501 kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run
1953022 - CVE-2021-3543 kernel: nitro_enclaves stale file descriptors on failed usercopy

6. Package List:

Red Hat Enterprise Linux BaseOS (v. 8):

Source:
kernel-4.18.0-305.3.1.el8_4.src.rpm

aarch64:
bpftool-4.18.0-305.3.1.el8_4.aarch64.rpm
bpftool-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-core-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-cross-headers-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debug-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debug-core-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debug-devel-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debug-modules-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debug-modules-extra-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-devel-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-headers-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-modules-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-modules-extra-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-tools-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-tools-libs-4.18.0-305.3.1.el8_4.aarch64.rpm
perf-4.18.0-305.3.1.el8_4.aarch64.rpm
perf-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
python3-perf-4.18.0-305.3.1.el8_4.aarch64.rpm
python3-perf-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm

noarch:
kernel-abi-stablelists-4.18.0-305.3.1.el8_4.noarch.rpm
kernel-doc-4.18.0-305.3.1.el8_4.noarch.rpm

ppc64le:
bpftool-4.18.0-305.3.1.el8_4.ppc64le.rpm
bpftool-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-core-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-cross-headers-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debug-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debug-core-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debug-devel-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debug-modules-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-devel-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-headers-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-modules-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-modules-extra-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-tools-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-tools-libs-4.18.0-305.3.1.el8_4.ppc64le.rpm
perf-4.18.0-305.3.1.el8_4.ppc64le.rpm
perf-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
python3-perf-4.18.0-305.3.1.el8_4.ppc64le.rpm
python3-perf-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm

s390x:
bpftool-4.18.0-305.3.1.el8_4.s390x.rpm
bpftool-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-core-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-cross-headers-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-debug-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-debug-core-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-debug-devel-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-debug-modules-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-debug-modules-extra-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-devel-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-headers-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-modules-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-modules-extra-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-tools-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-zfcpdump-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-zfcpdump-core-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-zfcpdump-devel-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-zfcpdump-modules-4.18.0-305.3.1.el8_4.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-305.3.1.el8_4.s390x.rpm
perf-4.18.0-305.3.1.el8_4.s390x.rpm
perf-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
python3-perf-4.18.0-305.3.1.el8_4.s390x.rpm
python3-perf-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm

x86_64:
bpftool-4.18.0-305.3.1.el8_4.x86_64.rpm
bpftool-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-core-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-cross-headers-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debug-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debug-core-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debug-devel-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debug-modules-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debug-modules-extra-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-devel-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-headers-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-modules-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-modules-extra-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-tools-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-tools-libs-4.18.0-305.3.1.el8_4.x86_64.rpm
perf-4.18.0-305.3.1.el8_4.x86_64.rpm
perf-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
python3-perf-4.18.0-305.3.1.el8_4.x86_64.rpm
python3-perf-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm

Red Hat CodeReady Linux Builder (v. 8):

aarch64:
bpftool-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
kernel-tools-libs-devel-4.18.0-305.3.1.el8_4.aarch64.rpm
perf-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
python3-perf-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm

ppc64le:
bpftool-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-305.3.1.el8_4.ppc64le.rpm
perf-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
python3-perf-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm

x86_64:
bpftool-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
kernel-tools-libs-devel-4.18.0-305.3.1.el8_4.x86_64.rpm
perf-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
python3-perf-debuginfo-4.18.0-305.3.1.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-2021-3501
https://access.redhat.com/security/cve/CVE-2021-3543
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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