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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2021:1288-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:1288
Issue date:        2021-04-20
CVE Names:         CVE-2020-29661 CVE-2021-20265 CVE-2021-27364
                   CVE-2021-27365
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 6
Extended Lifecycle 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 Enterprise Linux Server (v. 6 ELS) - i386, noarch, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6 ELS) - i386, s390x, x86_64

3. Description:

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

Security Fix(es):

* kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an
use-after-free (CVE-2020-29661)

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

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

* kernel: increase slab leak leads to DoS (CVE-2021-20265)

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#1930523)

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/):

1906525 - CVE-2020-29661 kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free
1908827 - CVE-2021-20265 kernel: increase slab leak leads to DoS
1930078 - CVE-2021-27365 kernel: heap buffer overflow in the iSCSI subsystem
1930080 - CVE-2021-27364 kernel: out-of-bounds read in libiscsi module

6. Package List:

Red Hat Enterprise Linux Server (v. 6 ELS):

Source:
kernel-2.6.32-754.39.1.el6.src.rpm

i386:
kernel-2.6.32-754.39.1.el6.i686.rpm
kernel-debug-2.6.32-754.39.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-754.39.1.el6.i686.rpm
kernel-debug-devel-2.6.32-754.39.1.el6.i686.rpm
kernel-debuginfo-2.6.32-754.39.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-754.39.1.el6.i686.rpm
kernel-devel-2.6.32-754.39.1.el6.i686.rpm
kernel-headers-2.6.32-754.39.1.el6.i686.rpm
perf-2.6.32-754.39.1.el6.i686.rpm
perf-debuginfo-2.6.32-754.39.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-754.39.1.el6.i686.rpm

noarch:
kernel-abi-whitelists-2.6.32-754.39.1.el6.noarch.rpm
kernel-doc-2.6.32-754.39.1.el6.noarch.rpm
kernel-firmware-2.6.32-754.39.1.el6.noarch.rpm

s390x:
kernel-2.6.32-754.39.1.el6.s390x.rpm
kernel-debug-2.6.32-754.39.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-754.39.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-754.39.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-754.39.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-754.39.1.el6.s390x.rpm
kernel-devel-2.6.32-754.39.1.el6.s390x.rpm
kernel-headers-2.6.32-754.39.1.el6.s390x.rpm
kernel-kdump-2.6.32-754.39.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-754.39.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-754.39.1.el6.s390x.rpm
perf-2.6.32-754.39.1.el6.s390x.rpm
perf-debuginfo-2.6.32-754.39.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-754.39.1.el6.s390x.rpm

x86_64:
kernel-2.6.32-754.39.1.el6.x86_64.rpm
kernel-debug-2.6.32-754.39.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-754.39.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-754.39.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-754.39.1.el6.i686.rpm
kernel-debug-devel-2.6.32-754.39.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-754.39.1.el6.i686.rpm
kernel-debuginfo-2.6.32-754.39.1.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-754.39.1.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-754.39.1.el6.x86_64.rpm
kernel-devel-2.6.32-754.39.1.el6.x86_64.rpm
kernel-headers-2.6.32-754.39.1.el6.x86_64.rpm
perf-2.6.32-754.39.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-754.39.1.el6.i686.rpm
perf-debuginfo-2.6.32-754.39.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-754.39.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-754.39.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6 ELS):

i386:
kernel-debug-debuginfo-2.6.32-754.39.1.el6.i686.rpm
kernel-debuginfo-2.6.32-754.39.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-754.39.1.el6.i686.rpm
perf-debuginfo-2.6.32-754.39.1.el6.i686.rpm
python-perf-2.6.32-754.39.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-754.39.1.el6.i686.rpm

s390x:
kernel-debug-debuginfo-2.6.32-754.39.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-754.39.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-754.39.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-754.39.1.el6.s390x.rpm
perf-debuginfo-2.6.32-754.39.1.el6.s390x.rpm
python-perf-2.6.32-754.39.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-754.39.1.el6.s390x.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-754.39.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-754.39.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-754.39.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-754.39.1.el6.x86_64.rpm
python-perf-2.6.32-754.39.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-754.39.1.el6.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-2020-29661
https://access.redhat.com/security/cve/CVE-2021-20265
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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