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RHEL 8.4: RHSA-2023:1662-01 Important Kpatch Use-After-Free Fix

red hat
Calendar Grey April 5, 2023
Dist Redhat Esm H88
Red Hat launched a crucial revision for kpatch-patch concerning RHEL 8.4 to address significant vulnerabilities.
An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.4 Extended Update Support

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):
* ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF (CVE-2023-0266)
* kernel: net/ulp: use-after-free in listening ULP sockets (CVE-2023-0461)
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 Red Hat Enterprise Linux important use-after-free kpatch-patch UAF

References

https://access.redhat.com/security/cve/CVE-2023-0266 https://access.redhat.com/security/cve/CVE-2023-0461 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v.8.4):
Source: kpatch-patch-4_18_0-305_65_1-1-5.el8_4.src.rpm kpatch-patch-4_18_0-305_71_1-1-4.el8_4.src.rpm kpatch-patch-4_18_0-305_72_1-1-3.el8_4.src.rpm kpatch-patch-4_18_0-305_76_1-1-2.el8_4.src.rpm kpatch-patch-4_18_0-305_82_1-1-1.el8_4.src.rpm
ppc64le: kpatch-patch-4_18_0-305_65_1-1-5.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_65_1-debuginfo-1-5.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_65_1-debugsource-1-5.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_71_1-1-4.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_71_1-debuginfo-1-4.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_71_1-debugsource-1-4.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_72_1-1-3.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_72_1-debuginfo-1-3.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_72_1-debugsource-1-3.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_76_1-1-2.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_76_1-debuginfo-1-2.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_76_1-debugsource-1-2.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_82_1-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_82_1-debuginfo-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_82_1-debugsource-1-1.el8_4.ppc64le.rpm
x86_64: kpatch-patch-4_18_0-305_65_1-1-5.el8_4.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:1662-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:1662
Issue date: 2023-04-05

Topic

An update for kpatch-patch is now available for Red Hat Enterprise Linux8.4 Extended Update Support.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 Red Hat Enterprise Linux important use-after-free kpatch-patch UAF

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS EUS (v.8.4) - ppc64le, x86_64

Bugs Fixed

2163379 - CVE-2023-0266 ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF

2176192 - CVE-2023-0461 kernel: net/ulp: use-after-free in listening ULP sockets

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