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

                               ESB-2023.7139
                         kernel-rt security update
                             29 November 2023

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

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

Product:           kernel-rt
Publisher:         Red Hat
Operating System:  Red Hat
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-5178 CVE-2023-3812 CVE-2023-2163
                   CVE-2023-1192 CVE-2022-45919 CVE-2022-45886
                   CVE-2022-45884  

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2023:7548

Comment: CVSS (Max):  8.8 CVE-2023-5178 (CVSS:3.1/AV:N/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:N/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-2023:7548
Product:           Red Hat Enterprise Linux Real Time for NFV (v. 8)
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:7548
Issue date:        2023-11-28
CVE Names:         CVE-2022-45884 CVE-2022-45886 CVE-2022-45919 CVE-2023-1192
                   CVE-2023-2163 CVE-2023-3812 CVE-2023-5178
=====================================================================

1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

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 (v. 8) - x86_64 
Red Hat Enterprise Linux for Real Time (v. 8) - 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: bpf: Incorrect verifier pruning leads to unsafe code paths being
incorrectly marked as safe (CVE-2023-2163)

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

* kernel: use after free in nvmet_tcp_free_crypto in NVMe (CVE-2023-5178)

* kernel: use-after-free due to race condition occurring in
dvb_register_device() (CVE-2022-45884)

* kernel: use-after-free due to race condition occurring in dvb_net.c
(CVE-2022-45886)

* kernel: use-after-free due to race condition occurring in dvb_ca_en50221.c
(CVE-2022-45919)

* kernel: use-after-free in smb2_is_status_io_timeout() (CVE-2023-1192)

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/):

2148510 - CVE-2022-45884 - kernel: use-after-free due to race condition
occurring in dvb_register_device()
2148517 - CVE-2022-45886 - kernel: use-after-free due to race condition
occurring in dvb_net.c
2151956 - CVE-2022-45919 - kernel: use-after-free due to race condition
occurring in dvb_ca_en50221.c
2154178 - CVE-2023-1192 - kernel: use-after-free in smb2_is_status_io_timeout() 
2240249 - CVE-2023-2163 - kernel: bpf: Incorrect verifier pruning leads to
unsafe code paths being incorrectly marked as safe
2224048 - CVE-2023-3812 - kernel: tun: bugs for oversize packet when napi frags
enabled in tun_napi_alloc_frags
2241924 - CVE-2023-5178 - kernel: use after free in nvmet_tcp_free_crypto in
NVMe

6. Package List:

Red Hat Enterprise Linux Real Time for NFV (v. 8)

Source:
kernel-rt-0:4.18.0-513.9.1.rt7.311.el8_9.src.rpm

x86_64:
kernel-rt-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-core-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-core-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-debuginfo-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-devel-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-kvm-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-modules-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-modules-extra-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debuginfo-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-devel-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-kvm-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-modules-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-modules-extra-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm

Red Hat Enterprise Linux for Real Time (v. 8)

Source:
kernel-rt-0:4.18.0-513.9.1.rt7.311.el8_9.src.rpm

x86_64:
kernel-rt-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-core-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-core-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-debuginfo-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-devel-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-kvm-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-modules-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debug-modules-extra-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debuginfo-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-devel-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-kvm-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-modules-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm
kernel-rt-modules-extra-0:4.18.0-513.9.1.rt7.311.el8_9.x86_64.rpm

7. References:

https://access.redhat.com/security/cve/CVE-2022-45884
https://access.redhat.com/security/cve/CVE-2022-45886
https://access.redhat.com/security/cve/CVE-2022-45919
https://access.redhat.com/security/cve/CVE-2023-1192
https://access.redhat.com/security/cve/CVE-2023-2163
https://access.redhat.com/security/cve/CVE-2023-3812
https://access.redhat.com/security/cve/CVE-2023-5178
https://access.redhat.com/security/updates/classification/#important

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