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Important Kpatch Update for Kernel Issues in Red Hat Enterprise Linux 8.2

red hat
Calendar Grey July 20, 2021
Dist Redhat Esm H88
Fedora Security Bulletin regarding kpatch-patch upgrade addressing numerous security flaws. Specifics on resolutions and risk levels provided.
An update is now available for Red Hat Enterprise Linux 8.2 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):
* kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)
* kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)
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 patch important kernel use-after-free kpatch

References

https://access.redhat.com/security/cve/CVE-2021-33034 https://access.redhat.com/security/cve/CVE-2021-33909 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/security/vulnerabilities/RHSB-2021-006

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.2):
Source: kpatch-patch-4_18_0-193_13_2-1-10.el8_2.src.rpm kpatch-patch-4_18_0-193_14_3-1-10.el8_2.src.rpm kpatch-patch-4_18_0-193_19_1-1-10.el8_2.src.rpm kpatch-patch-4_18_0-193_28_1-1-8.el8_2.src.rpm kpatch-patch-4_18_0-193_29_1-1-8.el8_2.src.rpm kpatch-patch-4_18_0-193_37_1-1-8.el8_2.src.rpm kpatch-patch-4_18_0-193_40_1-1-8.el8_2.src.rpm kpatch-patch-4_18_0-193_41_1-1-8.el8_2.src.rpm kpatch-patch-4_18_0-193_46_1-1-5.el8_2.src.rpm kpatch-patch-4_18_0-193_47_1-1-5.el8_2.src.rpm kpatch-patch-4_18_0-193_51_1-1-2.el8_2.src.rpm kpatch-patch-4_18_0-193_56_1-1-1.el8_2.src.rpm
ppc64le: kpatch-patch-4_18_0-193_13_2-1-10.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_13_2-debuginfo-1-10.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_13_2-debugsource-1-10.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_14_3-1-10.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_14_3-debuginfo-1-10.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_14_3-debugsource-1-10.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_19_1-1-10.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_19_1-debuginfo-1-10.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_19_1-debugsource-1-10.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_28_1-1-8.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_28_1-debuginfo-1-8.el8_2.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:2720-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2720
Issue date: 2021-07-20

Topic

An update is now available for Red Hat Enterprise Linux 8.2 Extended UpdateSupport.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 patch important kernel use-after-free kpatch

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS EUS (v. 8.2) - ppc64le, x86_64

Bugs Fixed

1961305 - CVE-2021-33034 kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan

1970273 - CVE-2021-33909 kernel: size_t-to-int conversion vulnerability in the filesystem layer

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