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

Synopsis:          Important: kpatch-patch security update
Advisory ID:       RHSA-2023:4531-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:4531
Issue date:        2023-08-08
CVE Names:         CVE-2022-42896 CVE-2023-1281 CVE-2023-1829 
=====================================================================

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: use-after-free in l2cap_connect and l2cap_le_connect_req in
net/bluetooth/l2cap_core.c (CVE-2022-42896)

* kernel: tcindex: use-after-free vulnerability in traffic control index
filter allows privilege escalation (CVE-2023-1281)

* kernel: Use-after-free vulnerability in the Linux Kernel traffic control
index filter (CVE-2023-1829)

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/):

2147364 - CVE-2022-42896 kernel: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c
2181847 - CVE-2023-1281 kernel: tcindex: use-after-free vulnerability in traffic control index filter allows privilege escalation
2188470 - CVE-2023-1829 kernel: Use-after-free vulnerability in the Linux Kernel traffic control index filter

6. Package List:

Red Hat Enterprise Linux BaseOS (v. 8):

Source:
kpatch-patch-4_18_0-477_10_1-1-2.el8_8.src.rpm
kpatch-patch-4_18_0-477_13_1-1-1.el8_8.src.rpm
kpatch-patch-4_18_0-477_15_1-1-1.el8_8.src.rpm

ppc64le:
kpatch-patch-4_18_0-477_10_1-1-2.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_10_1-debuginfo-1-2.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_10_1-debugsource-1-2.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_13_1-1-1.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_13_1-debuginfo-1-1.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_13_1-debugsource-1-1.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_15_1-1-1.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_15_1-debuginfo-1-1.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_15_1-debugsource-1-1.el8_8.ppc64le.rpm

x86_64:
kpatch-patch-4_18_0-477_10_1-1-2.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_10_1-debuginfo-1-2.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_10_1-debugsource-1-2.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_13_1-1-1.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_13_1-debuginfo-1-1.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_13_1-debugsource-1-1.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_15_1-1-1.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_15_1-debuginfo-1-1.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_15_1-debugsource-1-1.el8_8.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-2022-42896
https://access.redhat.com/security/cve/CVE-2023-1281
https://access.redhat.com/security/cve/CVE-2023-1829
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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