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             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.7159
                       kpatch-patch security update
                             29 November 2023

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

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

Product:           kpatch-patch
Publisher:         Red Hat
Operating System:  Red Hat
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-5178 CVE-2023-3812 CVE-2023-2163

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2023:7554

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: kpatch-patch security update
Advisory ID:       RHSA-2023:7554
Product:           Red Hat Enterprise Linux BaseOS (v. 8)
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:7554
Issue date:        2023-11-28
CVE Names:         CVE-2023-2163 CVE-2023-3812 CVE-2023-5178
=====================================================================

1. Summary:

An update for kpatch-patch 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 BaseOS (v. 8) - ppc64le, x86_64 

3. Description:

This is a kernel live patch module which is automatically loaded by the RPM
post-install script to modify the code of a running kernel.

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)

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

5. Bugs fixed (https://bugzilla.redhat.com/):

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 BaseOS (v. 8)

ppc64le:
kpatch-patch-4_18_0-513_5_1-0:1-1.el8_9.ppc64le.rpm
kpatch-patch-4_18_0-513_5_1-debuginfo-0:1-1.el8_9.ppc64le.rpm
kpatch-patch-4_18_0-513_5_1-debugsource-0:1-1.el8_9.ppc64le.rpm

Source:
kpatch-patch-4_18_0-513_5_1-0:1-1.el8_9.src.rpm

x86_64:
kpatch-patch-4_18_0-513_5_1-0:1-1.el8_9.x86_64.rpm
kpatch-patch-4_18_0-513_5_1-debuginfo-0:1-1.el8_9.x86_64.rpm
kpatch-patch-4_18_0-513_5_1-debugsource-0:1-1.el8_9.x86_64.rpm

7. References:

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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