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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2021:1267-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:1267
Issue date:        2021-04-20
CVE Names:         CVE-2020-14351 CVE-2021-27363 CVE-2021-27364 
                   CVE-2021-27365 
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.4
Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP
Solutions.

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 Server AUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.4) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server TUS (v. 7.4) - noarch, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es):

* kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)

* kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)

* kernel: performance counters race condition use-after-free
(CVE-2020-14351)

* kernel: iscsi: unrestricted access to sessions and handles
(CVE-2021-27363)

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):

* Enable CI and changelog for GitLab workflow (BZ#1930932)

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/):

1862849 - CVE-2020-14351 kernel: performance counters race condition
 use-after-free
1930078 - CVE-2021-27365 kernel: heap buffer overflow in the iSCSI subsystem
1930079 - CVE-2021-27363 kernel: iscsi: unrestricted access to sessions and
 handles
1930080 - CVE-2021-27364 kernel: out-of-bounds read in libiscsi module

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.4):

Source:
kernel-3.10.0-693.84.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-693.84.1.el7.noarch.rpm
kernel-doc-3.10.0-693.84.1.el7.noarch.rpm

x86_64:
kernel-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.84.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.84.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.84.1.el7.x86_64.rpm
perf-3.10.0-693.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
python-perf-3.10.0-693.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.4):

Source:
kernel-3.10.0-693.84.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-693.84.1.el7.noarch.rpm
kernel-doc-3.10.0-693.84.1.el7.noarch.rpm

ppc64le:
kernel-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-debug-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-devel-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-headers-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-tools-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-693.84.1.el7.ppc64le.rpm
perf-3.10.0-693.84.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-693.84.1.el7.ppc64le.rpm
python-perf-3.10.0-693.84.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-693.84.1.el7.ppc64le.rpm

x86_64:
kernel-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.84.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.84.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.84.1.el7.x86_64.rpm
perf-3.10.0-693.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
python-perf-3.10.0-693.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.4):

Source:
kernel-3.10.0-693.84.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-693.84.1.el7.noarch.rpm
kernel-doc-3.10.0-693.84.1.el7.noarch.rpm

x86_64:
kernel-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.84.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.84.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.84.1.el7.x86_64.rpm
perf-3.10.0-693.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
python-perf-3.10.0-693.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.4):

x86_64:
kernel-debug-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.4):

ppc64le:
kernel-debug-debuginfo-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-693.84.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-693.84.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-693.84.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-693.84.1.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.4):

x86_64:
kernel-debug-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.84.1.el7.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-2020-14351
https://access.redhat.com/security/cve/CVE-2021-27363
https://access.redhat.com/security/cve/CVE-2021-27364
https://access.redhat.com/security/cve/CVE-2021-27365
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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