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

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

Synopsis:          Important: kernel-rt security and bug fix update
Advisory ID:       RHSA-2021:1070-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:1070
Issue date:        2021-04-06
CVE Names:         CVE-2021-27363 CVE-2021-27364 CVE-2021-27365 
=====================================================================

1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

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 for Real Time (v. 7) - noarch, x86_64
Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, 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: out-of-bounds read in libiscsi module (CVE-2021-27364)

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

* 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):

* RHEL7.9 Realtime crashes due to a blocked task detection. The blocked
task is stuck in unregister_shrinker() where multiple tasks have taken the
shrinker_rwsem and are fighting on a dentry's d_lockref lock rt_mutex.
[kernel-rt] (BZ#1935557)

* kernel-rt: update to the latest RHEL7.9.z5 source tree (BZ#1939220)

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/):

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 for Real Time for NFV (v. 7):

Source:
kernel-rt-3.10.0-1160.24.1.rt56.1161.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1160.24.1.rt56.1161.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm

Red Hat Enterprise Linux for Real Time (v. 7):

Source:
kernel-rt-3.10.0-1160.24.1.rt56.1161.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1160.24.1.rt56.1161.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1160.24.1.rt56.1161.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1160.24.1.rt56.1161.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-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 . 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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=OvRU
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
[email protected]
https://listman.redhat.com/mailman/listinfo/rhsa-announce