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Red Hat Enterprise Linux 7.7: Key Fix for Use-After-Free RHSA-2023-3278-01

red hat
Calendar Grey May 23, 2023
Dist Redhat Esm H88
Red Hat publishes a critical kpatch-release fix tackling a memory management flaw in kernel restart for SAP Applications.
An update for kpatch-patch is now available for Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions

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 caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c (CVE-2022-3564)
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 security update Red Hat Enterprise Linux important kernel use-after-free kpatch-patch

References

https://access.redhat.com/security/cve/CVE-2022-3564 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Server E4S (v. 7.7):
Source: kpatch-patch-3_10_0-1062_71_1-1-1.el7.src.rpm
ppc64le: kpatch-patch-3_10_0-1062_71_1-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-1062_71_1-debuginfo-1-1.el7.ppc64le.rpm
x86_64: kpatch-patch-3_10_0-1062_71_1-1-1.el7.x86_64.rpm kpatch-patch-3_10_0-1062_71_1-debuginfo-1-1.el7.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


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:3278-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:3278
Issue date: 2023-05-23

Topic

An update for kpatch-patch is now available for Red Hat Enterprise Linux7.7 Update Services for SAP Solutions.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 security update Red Hat Enterprise Linux important kernel use-after-free kpatch-patch

Relevant Releases Architectures

Red Hat Enterprise Linux Server E4S (v. 7.7) - ppc64le, x86_64

Bugs Fixed

2150999 - CVE-2022-3564 kernel: use-after-free caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c

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