Protect yourself against future threats.
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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.3897
kernel security, bug fix, and enhancement update
16 November 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Increased Privileges -- Remote/Unauthenticated
Denial of Service -- Existing Account
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-43267 CVE-2021-28950 CVE-2021-20317
Reference: ESB-2021.3889
ESB-2021.3888
ESB-2021.3887
ESB-2021.3825
ESB-2021.3796
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:4650
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: kernel security, bug fix, and enhancement update
Advisory ID: RHSA-2021:4650-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4650
Issue date: 2021-11-15
CVE Names: CVE-2021-20317 CVE-2021-28950 CVE-2021-43267
=====================================================================
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: Insufficient validation of user-supplied sizes for the MSG_CRYPTO
message type (CVE-2021-43267)
* kernel: timer tree corruption leads to missing wakeup and system freeze
(CVE-2021-20317)
* kernel: fuse: stall on CPU can occur because a retry loop continually
finds the same bad inode (CVE-2021-28950)
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):
* Fix repeated xhci wake after suspend due to uncleared internal wake state
(BZ#2003789)
* CephFS mount points return "permission denied" (BZ#2017099)
Enhancement(s):
* Update qla2xxx driver to latest upstream (BZ#2014150)
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/):
1941762 - CVE-2021-28950 kernel: fuse: stall on CPU can occur because a retry loop continually finds the same bad inode
2005258 - CVE-2021-20317 kernel: timer tree corruption leads to missing wakeup and system freeze
2020362 - CVE-2021-43267 kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type
6. Package List:
Red Hat Enterprise Linux BaseOS EUS (v.8.4):
Source:
kernel-4.18.0-305.28.1.el8_4.src.rpm
aarch64:
bpftool-4.18.0-305.28.1.el8_4.aarch64.rpm
bpftool-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-core-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-cross-headers-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debug-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debug-core-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debug-devel-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debug-modules-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debug-modules-extra-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-devel-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-headers-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-modules-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-modules-extra-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-tools-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-tools-libs-4.18.0-305.28.1.el8_4.aarch64.rpm
perf-4.18.0-305.28.1.el8_4.aarch64.rpm
perf-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
python3-perf-4.18.0-305.28.1.el8_4.aarch64.rpm
python3-perf-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
noarch:
kernel-abi-stablelists-4.18.0-305.28.1.el8_4.noarch.rpm
kernel-doc-4.18.0-305.28.1.el8_4.noarch.rpm
ppc64le:
bpftool-4.18.0-305.28.1.el8_4.ppc64le.rpm
bpftool-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-core-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-cross-headers-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debug-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debug-core-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debug-devel-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debug-modules-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-devel-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-headers-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-modules-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-modules-extra-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-tools-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-tools-libs-4.18.0-305.28.1.el8_4.ppc64le.rpm
perf-4.18.0-305.28.1.el8_4.ppc64le.rpm
perf-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
python3-perf-4.18.0-305.28.1.el8_4.ppc64le.rpm
python3-perf-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
s390x:
bpftool-4.18.0-305.28.1.el8_4.s390x.rpm
bpftool-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-core-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-cross-headers-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-debug-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-debug-core-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-debug-devel-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-debug-modules-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-debug-modules-extra-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-devel-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-headers-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-modules-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-modules-extra-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-tools-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-zfcpdump-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-zfcpdump-core-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-zfcpdump-devel-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-zfcpdump-modules-4.18.0-305.28.1.el8_4.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-305.28.1.el8_4.s390x.rpm
perf-4.18.0-305.28.1.el8_4.s390x.rpm
perf-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
python3-perf-4.18.0-305.28.1.el8_4.s390x.rpm
python3-perf-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
x86_64:
bpftool-4.18.0-305.28.1.el8_4.x86_64.rpm
bpftool-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-core-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-cross-headers-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debug-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debug-core-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debug-devel-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debug-modules-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debug-modules-extra-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-devel-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-headers-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-modules-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-modules-extra-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-tools-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-tools-libs-4.18.0-305.28.1.el8_4.x86_64.rpm
perf-4.18.0-305.28.1.el8_4.x86_64.rpm
perf-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
python3-perf-4.18.0-305.28.1.el8_4.x86_64.rpm
python3-perf-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
Red Hat CodeReady Linux Builder EUS (v. 8.4):
aarch64:
bpftool-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
kernel-tools-libs-devel-4.18.0-305.28.1.el8_4.aarch64.rpm
perf-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
python3-perf-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
ppc64le:
bpftool-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-305.28.1.el8_4.ppc64le.rpm
perf-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
python3-perf-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
x86_64:
bpftool-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
kernel-tools-libs-devel-4.18.0-305.28.1.el8_4.x86_64.rpm
perf-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
python3-perf-debuginfo-4.18.0-305.28.1.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-2021-20317
https://access.redhat.com/security/cve/CVE-2021-28950
https://access.redhat.com/security/cve/CVE-2021-43267
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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