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Red Hat Enterprise Linux 8.2 RHSA-2021-3380-01 Critical Kpatch Update

red hat
Calendar Grey August 31, 2021
Dist Redhat Esm H88
SUSE unveils a crucial kernel-modules upgrade for SLES, addressing several vulnerabilities to enhance overall system protection.
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: race condition in net/can/bcm.c leads to local privilege escalation (CVE-2021-3609)
* kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)
* kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)
* kernel: race condition for removal of the HCI controller (CVE-2021-32399)
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 denial of service local privilege escalation Red Hat Enterprise Linux important kernel fix KVM bypass

References

https://access.redhat.com/security/cve/CVE-2021-3609 https://access.redhat.com/security/cve/CVE-2021-22543 https://access.redhat.com/security/cve/CVE-2021-22555 https://access.redhat.com/security/cve/CVE-2021-32399 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.2):
Source: kpatch-patch-4_18_0-193_19_1-1-11.el8_2.src.rpm kpatch-patch-4_18_0-193_28_1-1-9.el8_2.src.rpm kpatch-patch-4_18_0-193_29_1-1-9.el8_2.src.rpm kpatch-patch-4_18_0-193_37_1-1-9.el8_2.src.rpm kpatch-patch-4_18_0-193_40_1-1-9.el8_2.src.rpm kpatch-patch-4_18_0-193_41_1-1-9.el8_2.src.rpm kpatch-patch-4_18_0-193_46_1-1-6.el8_2.src.rpm kpatch-patch-4_18_0-193_47_1-1-6.el8_2.src.rpm kpatch-patch-4_18_0-193_51_1-1-3.el8_2.src.rpm kpatch-patch-4_18_0-193_56_1-1-2.el8_2.src.rpm kpatch-patch-4_18_0-193_60_2-1-1.el8_2.src.rpm
ppc64le: kpatch-patch-4_18_0-193_19_1-1-11.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_19_1-debuginfo-1-11.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_19_1-debugsource-1-11.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_28_1-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_28_1-debuginfo-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_28_1-debugsource-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_29_1-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_29_1-debuginfo-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_29_1-debugsource-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_37_1-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_37_1-debuginfo-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_37_1-debugsource-1-9.el8_2.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3380-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3380
Issue date: 2021-08-31

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 denial of service local privilege escalation Red Hat Enterprise Linux important kernel fix KVM bypass

Relevant Releases Architectures

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

Bugs Fixed

1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks

1970807 - CVE-2021-32399 kernel: race condition for removal of the HCI controller

1971651 - CVE-2021-3609 kernel: race condition in net/can/bcm.c leads to local privilege escalation

1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c

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