An update for kernel is now available for Red Hat Enterprise Linux 8.4 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,

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

Synopsis:          Important: kernel security, bug fix, and enhancement update
Advisory ID:       RHSA-2022:1455-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2022:1455
Issue date:        2022-04-20
CVE Names:         CVE-2021-4083 CVE-2022-0492 CVE-2022-25636 
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 8.4
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. 8.4) - aarch64, ppc64le, x86_64
Red Hat Enterprise Linux BaseOS EUS (v.8.4) - 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: fget: check that the fd still exists after getting a ref to it
(CVE-2021-4083)

* kernel: cgroups v1 release_agent feature may allow privilege escalation
(CVE-2022-0492)

* kernel: heap out of bounds write in nf_dup_netdev.c (CVE-2022-25636)

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 Fixes:

* Power10 PMU fix for  PM_CYC/PM_INST_CMPL ( kernel/perf) (BZ#2040665)

* call traces and packet drops seen after changing mtu of ibmvnic
interface. (ibmvnic/ P10/ Everglade) (BZ#2050679)

* zfcp: fix failed recovery on gone remote port, non-NPIV FCP dev
(BZ#2050739)

* overlay mount fails with ELOOP (Too many levels of symbolic links)
(BZ#2053030)

* Host unable to automatically add namespaces belonging to a new ANA group
(BZ#2055466)

* scheduler updates and fixes [None8.4.0.z] (BZ#2056834)

* nf_reinject calls nf_queue_entry_free on an already freed entry->state
(BZ#2061445)

* First Packet Latency impacted by mlx5 warning msg (BZ#2067992)

* openvswitch connection tracking sends incorrect flow key for some upcalls
(BZ#2068477)

* Backport upstream rcu commits up to v5.10 (BZ#2069819)

* Packages have been upgraded to a later upstream version: kernel (4.18.0)
(BZ#2036932)

Enhancement:

* zcrypt DD: Toleration for new IBM Z Crypto Hardware (BZ#2054097)

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/):

2029923 - CVE-2021-4083 kernel: fget: check that the fd still exists after getting a ref to it
2051505 - CVE-2022-0492 kernel: cgroups v1 release_agent feature may allow privilege escalation
2056830 - CVE-2022-25636 kernel: heap out of bounds write in nf_dup_netdev.c

6. Package List:

Red Hat Enterprise Linux BaseOS EUS (v.8.4):

Source:
kernel-4.18.0-305.45.1.el8_4.src.rpm

aarch64:
bpftool-4.18.0-305.45.1.el8_4.aarch64.rpm
bpftool-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-core-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-cross-headers-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debug-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debug-core-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debug-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debug-devel-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debug-modules-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debug-modules-extra-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-devel-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-headers-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-modules-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-modules-extra-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-tools-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-tools-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-tools-libs-4.18.0-305.45.1.el8_4.aarch64.rpm
perf-4.18.0-305.45.1.el8_4.aarch64.rpm
perf-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm
python3-perf-4.18.0-305.45.1.el8_4.aarch64.rpm
python3-perf-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm

noarch:
kernel-abi-stablelists-4.18.0-305.45.1.el8_4.noarch.rpm
kernel-doc-4.18.0-305.45.1.el8_4.noarch.rpm

ppc64le:
bpftool-4.18.0-305.45.1.el8_4.ppc64le.rpm
bpftool-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-core-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-cross-headers-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debug-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debug-core-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debug-devel-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debug-modules-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-devel-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-headers-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-modules-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-modules-extra-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-tools-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-tools-libs-4.18.0-305.45.1.el8_4.ppc64le.rpm
perf-4.18.0-305.45.1.el8_4.ppc64le.rpm
perf-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm
python3-perf-4.18.0-305.45.1.el8_4.ppc64le.rpm
python3-perf-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm

s390x:
bpftool-4.18.0-305.45.1.el8_4.s390x.rpm
bpftool-debuginfo-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-core-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-cross-headers-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-debug-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-debug-core-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-debug-debuginfo-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-debug-devel-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-debug-modules-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-debug-modules-extra-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-debuginfo-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-devel-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-headers-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-modules-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-modules-extra-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-tools-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-tools-debuginfo-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-zfcpdump-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-zfcpdump-core-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-zfcpdump-devel-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-zfcpdump-modules-4.18.0-305.45.1.el8_4.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-305.45.1.el8_4.s390x.rpm
perf-4.18.0-305.45.1.el8_4.s390x.rpm
perf-debuginfo-4.18.0-305.45.1.el8_4.s390x.rpm
python3-perf-4.18.0-305.45.1.el8_4.s390x.rpm
python3-perf-debuginfo-4.18.0-305.45.1.el8_4.s390x.rpm

x86_64:
bpftool-4.18.0-305.45.1.el8_4.x86_64.rpm
bpftool-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-core-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-cross-headers-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debug-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debug-core-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debug-devel-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debug-modules-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debug-modules-extra-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-devel-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-headers-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-modules-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-modules-extra-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-tools-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-tools-libs-4.18.0-305.45.1.el8_4.x86_64.rpm
perf-4.18.0-305.45.1.el8_4.x86_64.rpm
perf-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm
python3-perf-4.18.0-305.45.1.el8_4.x86_64.rpm
python3-perf-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm

Red Hat CodeReady Linux Builder EUS (v. 8.4):

aarch64:
bpftool-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debug-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-tools-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm
kernel-tools-libs-devel-4.18.0-305.45.1.el8_4.aarch64.rpm
perf-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm
python3-perf-debuginfo-4.18.0-305.45.1.el8_4.aarch64.rpm

ppc64le:
bpftool-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-305.45.1.el8_4.ppc64le.rpm
perf-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm
python3-perf-debuginfo-4.18.0-305.45.1.el8_4.ppc64le.rpm

x86_64:
bpftool-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm
kernel-tools-libs-devel-4.18.0-305.45.1.el8_4.x86_64.rpm
perf-debuginfo-4.18.0-305.45.1.el8_4.x86_64.rpm
python3-perf-debuginfo-4.18.0-305.45.1.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-2021-4083
https://access.redhat.com/security/cve/CVE-2022-0492
https://access.redhat.com/security/cve/CVE-2022-25636
https://access.redhat.com/security/updates/classification#important

8. Contact:

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

Copyright 2022 Red Hat, Inc.
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