-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

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

Synopsis:          Important: kernel-rt security and bug fix update
Advisory ID:       RHSA-2021:4646-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:4646
Issue date:        2021-11-15
CVE Names:         CVE-2021-20317 CVE-2021-43267 
====================================================================
1. Summary:

An update for kernel-rt 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 Enterprise Linux Real Time for NFV (v. 8) - x86_64
Red Hat Enterprise Linux for Real Time (v. 8) - x86_64

3. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables
fine-tuning for systems with extremely high determinism requirements.

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)

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):

* kernel-rt: update RT source tree to the RHEL-8.5.z source tree
(BZ#2020036)

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/):

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 Real Time for NFV (v. 8):

Source:
kernel-rt-4.18.0-348.2.1.rt7.132.el8_5.src.rpm

x86_64:
kernel-rt-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-core-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-core-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-devel-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-modules-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debuginfo-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-devel-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-kvm-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-modules-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-modules-extra-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm

Red Hat Enterprise Linux for Real Time (v. 8):

Source:
kernel-rt-4.18.0-348.2.1.rt7.132.el8_5.src.rpm

x86_64:
kernel-rt-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-core-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-core-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-devel-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-modules-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debuginfo-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-devel-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-modules-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
kernel-rt-modules-extra-4.18.0-348.2.1.rt7.132.el8_5.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-2021-43267
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 2021 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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6ebv
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://listman.redhat.com/mailman/listinfo/rhsa-announce