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             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.3887
                    kernel security and bug fix update
                               12 July 2023

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           kernel
Publisher:         Red Hat
Operating System:  Red Hat
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-3564  

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2023:4021

Comment: CVSS (Max):  7.1 CVE-2022-3564 (CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: Red Hat
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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                   Red Hat Security Advisory

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2023:4021-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:4021
Issue date:        2023-07-11
CVE Names:         CVE-2022-3564 
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.6
Advanced 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 Enterprise Linux Server AUS (v. 7.6) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.6) - x86_64

3. Description:

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

Security Fix(es):

* kernel: use-after-free caused by l2cap_reassemble_sdu() in
net/bluetooth/l2cap_core.c (CVE-2022-3564)

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):

* The iscsi target deadlocks when the same host acts as an initiator to
itself (i.e. connects via 127.0.0.1) (BZ#2183541)

* Double free issue in filelayout_alloc_commit_info (BZ#2212878)

* RHEL 7.2: XFS inode cluster corruption [rhel-7.9.z] (BZ#2213361)

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/):

2150999 - CVE-2022-3564 kernel: use-after-free caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.6):

Source:
kernel-3.10.0-957.104.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.104.1.el7.noarch.rpm
kernel-doc-3.10.0-957.104.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.104.1.el7.x86_64.rpm
kernel-3.10.0-957.104.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.104.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.104.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.104.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.104.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.104.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.104.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.104.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.104.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.104.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.104.1.el7.x86_64.rpm
perf-3.10.0-957.104.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.104.1.el7.x86_64.rpm
python-perf-3.10.0-957.104.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.104.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.6):

x86_64:
kernel-debug-debuginfo-3.10.0-957.104.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.104.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.104.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.104.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.104.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.104.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.104.1.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-2022-3564
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 2023 Red Hat, Inc.
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