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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.5840
      [RHSA-2023:5628] Important: kernel security and bug fix update
                              11 October 2023

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

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

Product:           kernel
Publisher:         Red Hat
Operating System:  Red Hat
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-4128 CVE-2023-3776 CVE-2023-3609
                   CVE-2023-1637 CVE-2023-1095 

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2023:5628

Comment: CVSS (Max):  7.8 CVE-2023-4128 (CVSS:3.1/AV:L/AC:L/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

- --------------------------BEGIN INCLUDED TEXT--------------------

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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2023:5628
Product:           Red Hat Enterprise Linux BaseOS AUS (v.8.4)
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:5628
Issue date:        2023-10-10
CVE Names:         CVE-2023-1095 CVE-2023-1637 CVE-2023-3609 CVE-2023-3776
                   CVE-2023-4128
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced
Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications
Update Service, and Red Hat Enterprise Linux 8.4 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 BaseOS AUS (v.8.4) - x86_64, noarch, ppc64le 
Red Hat Enterprise Linux BaseOS E4S (v.8.4) - x86_64, noarch, ppc64le 
Red Hat Enterprise Linux BaseOS TUS (v.8.4) - x86_64, noarch, ppc64le 

3. Description:

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

Security Fix(es):

* kernel: net/sched: cls_u32 component reference counter leak if
tcf_change_indev() fails (CVE-2023-3609)

* kernel: net/sched: cls_fw component can be exploited as result of failure in
tcf_change_indev function (CVE-2023-3776)

* kernel: net/sched: Use-after-free vulnerabilities in the net/sched
classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128)

* kernel: netfilter: NULL pointer dereference in nf_tables due to zeroed list
head (CVE-2023-1095)

* kernel: save/restore speculative MSRs during S3 suspend/resume (CVE-2023-1637)

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):

* avoid unnecessary page fault retires on shared memory types (BZ#2221102)

* [Hyper-V][RHEL-8] Fix VM crash/hang Issues due to fast VF add/remove events
(BZ#2227261)

* kernel-devel RPM cross-compiled by CKI contains host-arch scripts (BZ#2232139)

* iavf: hang in iavf_remove() - SNO node hangs after running systemctl reboot
(BZ#2232405)

* netfilter: RHEL 8.8 phase 2 backports from upstream (BZ#2236818)

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/):

2173973 - CVE-2023-1095 - NULL pointer dereference in nf_tables due to zeroed
list head
2181891 - CVE-2023-1637 - save/restore speculative MSRs during S3 suspend/resume
2225201 - CVE-2023-3609 - cls_u32 component reference counter leak if
tcf_change_indev() fails
2225097 - CVE-2023-3776 - cls_fw component can be exploited as result of failure
in tcf_change_indev function
2225511 - CVE-2023-4128 - cls_fw, cls_u32 and cls_route 

6. Package List:

Red Hat Enterprise Linux BaseOS AUS (v.8.4)

x86_64:
bpftool-0:4.18.0-305.108.1.el8_4.x86_64.rpm
bpftool-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-core-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-cross-headers-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-core-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-devel-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-modules-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-modules-extra-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-devel-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-modules-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-modules-extra-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-tools-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-tools-libs-0:4.18.0-305.108.1.el8_4.x86_64.rpm
perf-0:4.18.0-305.108.1.el8_4.x86_64.rpm
perf-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
python3-perf-0:4.18.0-305.108.1.el8_4.x86_64.rpm
python3-perf-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-headers-0:4.18.0-305.108.1.el8_4.x86_64.rpm

Source:
kernel-0:4.18.0-305.108.1.el8_4.src.rpm

noarch:
kernel-abi-stablelists-0:4.18.0-305.108.1.el8_4.noarch.rpm
kernel-doc-0:4.18.0-305.108.1.el8_4.noarch.rpm

Red Hat Enterprise Linux BaseOS E4S (v.8.4)

ppc64le:
bpftool-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
bpftool-debuginfo-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-core-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-cross-headers-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-debug-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-debug-core-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-debug-debuginfo-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-debug-devel-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-debug-modules-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-debug-modules-extra-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-debuginfo-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-debuginfo-common-ppc64le-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-devel-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-modules-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-modules-extra-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-tools-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-tools-debuginfo-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-tools-libs-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
perf-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
perf-debuginfo-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
python3-perf-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
python3-perf-debuginfo-0:4.18.0-305.108.1.el8_4.ppc64le.rpm
kernel-headers-0:4.18.0-305.108.1.el8_4.ppc64le.rpm

x86_64:
bpftool-0:4.18.0-305.108.1.el8_4.x86_64.rpm
bpftool-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-core-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-cross-headers-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-core-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-devel-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-modules-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-modules-extra-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-devel-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-modules-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-modules-extra-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-tools-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-tools-libs-0:4.18.0-305.108.1.el8_4.x86_64.rpm
perf-0:4.18.0-305.108.1.el8_4.x86_64.rpm
perf-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
python3-perf-0:4.18.0-305.108.1.el8_4.x86_64.rpm
python3-perf-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-headers-0:4.18.0-305.108.1.el8_4.x86_64.rpm

Source:
kernel-0:4.18.0-305.108.1.el8_4.src.rpm

noarch:
kernel-abi-stablelists-0:4.18.0-305.108.1.el8_4.noarch.rpm
kernel-doc-0:4.18.0-305.108.1.el8_4.noarch.rpm

Red Hat Enterprise Linux BaseOS TUS (v.8.4)

x86_64:
bpftool-0:4.18.0-305.108.1.el8_4.x86_64.rpm
bpftool-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-core-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-cross-headers-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-core-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-devel-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-modules-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debug-modules-extra-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-debuginfo-common-x86_64-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-devel-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-modules-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-modules-extra-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-tools-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-tools-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-tools-libs-0:4.18.0-305.108.1.el8_4.x86_64.rpm
perf-0:4.18.0-305.108.1.el8_4.x86_64.rpm
perf-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
python3-perf-0:4.18.0-305.108.1.el8_4.x86_64.rpm
python3-perf-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64.rpm
kernel-headers-0:4.18.0-305.108.1.el8_4.x86_64.rpm

Source:
kernel-0:4.18.0-305.108.1.el8_4.src.rpm

noarch:
kernel-abi-stablelists-0:4.18.0-305.108.1.el8_4.noarch.rpm
kernel-doc-0:4.18.0-305.108.1.el8_4.noarch.rpm

7. References:

https://www.cve.org/CVERecord?id=CVE-2023-1095
https://www.cve.org/CVERecord?id=CVE-2023-1637
https://www.cve.org/CVERecord?id=CVE-2023-3609
https://www.cve.org/CVERecord?id=CVE-2023-3776
https://www.cve.org/CVERecord?id=CVE-2023-4128
https://access.redhat.com/security/updates/classification/#important

- --------------------------END INCLUDED TEXT--------------------

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