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Red Hat Enterprise Linux 8 RHSA-2023:4531-01 Critical: Kpatch-Patch Update

red hat
Calendar Grey August 8, 2023
Scroller Redhat
Crucial Red Hat security patch for kpatch-patch rectifying use-after-free vulnerabilities and potential privilege escalation threats.
An update for kpatch-patch is now available for Red Hat Enterprise Linux 8

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

Summary

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.

Topics%20covered

Topics Covered

security advisory privilege escalation kernel security Red Hat Enterprise Linux important use-after-free kpatch-patch

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

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


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory privilege escalation kernel security Red Hat Enterprise Linux important use-after-free kpatch-patch

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS (v. 8) - ppc64le, x86_64

Bugs Fixed

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

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