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

                               ESB-2023.6906
                         kernel-rt security update
                             22 November 2023

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

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

Product:           kernel-rt
Publisher:         Red Hat
Operating System:  Red Hat
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-42753 CVE-2023-20593 CVE-2023-4147
                   CVE-2023-4004 CVE-2023-3812 CVE-2023-3776
                   CVE-2023-0590  

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2023:7389

Comment: CVSS (Max):  7.8 CVE-2023-4147 (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

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

Synopsis:          Important: kernel-rt security update
Advisory ID:       RHSA-2023:7389
Product:           Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:7389
Issue date:        2023-11-21
CVE Names:         CVE-2023-0590 CVE-2023-3776 CVE-2023-3812 CVE-2023-4004
                   CVE-2023-4147 CVE-2023-20593 CVE-2023-42753
=====================================================================

1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0
Extended 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 Real Time for NFV EUS (v.9.0) - x86_64 
Red Hat Enterprise Linux Real Time EUS (v.9.0) - 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: net/sched: cls_fw component can be exploited as result of failure in
tcf_change_indev function (CVE-2023-3776)

* kernel: tun: bugs for oversize packet when napi frags enabled in
tun_napi_alloc_frags (CVE-2023-3812)

* kernel: netfilter: use-after-free due to improper element removal in
nft_pipapo_remove() (CVE-2023-4004)

* kernel: netfilter: nf_tables_newrule when adding a rule with
NFTA_RULE_CHAIN_ID leads to use-after-free (CVE-2023-4147)

* kernel: netfilter: potential slab-out-of-bound access due to integer underflow
(CVE-2023-42753)

* kernel: use-after-free due to race condition in qdisc_graft() (CVE-2023-0590)

* hw: amd: Cross-Process Information Leak (CVE-2023-20593)

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.

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/):

2165741 - CVE-2023-0590 - kernel: use-after-free due to race condition in
qdisc_graft()
2225097 - CVE-2023-3776 - kernel: net/sched: cls_fw component can be exploited
as result of failure in tcf_change_indev function
2224048 - CVE-2023-3812 - kernel: tun: bugs for oversize packet when napi frags
enabled in tun_napi_alloc_frags
2225275 - CVE-2023-4004 - kernel: netfilter: use-after-free due to improper
element removal in nft_pipapo_remove()
2225239 - CVE-2023-4147 - kernel: netfilter: nf_tables_newrule when adding a
rule with NFTA_RULE_CHAIN_ID leads to use-after-free
2217845 - CVE-2023-20593 - hw: amd: Cross-Process Information Leak 
2239843 - CVE-2023-42753 - kernel: netfilter: potential slab-out-of-bound access
due to integer underflow

6. Package List:

Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)

Source:
kernel-rt-0:5.14.0-70.80.1.rt21.151.el9_0.src.rpm

x86_64:
kernel-rt-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-core-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-core-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-debuginfo-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-devel-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-kvm-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-modules-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-modules-extra-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debuginfo-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-devel-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-kvm-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-modules-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-modules-extra-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm

Red Hat Enterprise Linux Real Time EUS (v.9.0)

Source:
kernel-rt-0:5.14.0-70.80.1.rt21.151.el9_0.src.rpm

x86_64:
kernel-rt-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-core-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-core-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-debuginfo-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-devel-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-kvm-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-modules-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debug-modules-extra-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debuginfo-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-devel-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-kvm-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-modules-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm
kernel-rt-modules-extra-0:5.14.0-70.80.1.rt21.151.el9_0.x86_64.rpm

7. References:

https://access.redhat.com/security/cve/CVE-2023-0590
https://access.redhat.com/security/cve/CVE-2023-3776
https://access.redhat.com/security/cve/CVE-2023-3812
https://access.redhat.com/security/cve/CVE-2023-4004
https://access.redhat.com/security/cve/CVE-2023-4147
https://access.redhat.com/security/cve/CVE-2023-20593
https://access.redhat.com/security/cve/CVE-2023-42753
https://access.redhat.com/security/updates/classification/#important

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