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Red Hat Enterprise Linux 8: RHSA-2021-4122-01 Important: Kernel Issues

red hat
Calendar Grey November 3, 2021
Dist Redhat Esm H88
Debian has issued a significant security patch for the system kernel module. Implement the patch to resolve severe vulnerabilities.
An update 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 drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)
* kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c (CVE-2021-0512)
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 heap overflow use-after-free kpatch-patch

References

https://access.redhat.com/security/cve/CVE-2020-36385 https://access.redhat.com/security/cve/CVE-2021-0512 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: kpatch-patch-4_18_0-305-1-6.el8.src.rpm kpatch-patch-4_18_0-305_10_2-1-3.el8_4.src.rpm kpatch-patch-4_18_0-305_12_1-1-2.el8_4.src.rpm kpatch-patch-4_18_0-305_17_1-1-1.el8_4.src.rpm kpatch-patch-4_18_0-305_19_1-1-1.el8_4.src.rpm kpatch-patch-4_18_0-305_3_1-1-5.el8_4.src.rpm kpatch-patch-4_18_0-305_7_1-1-4.el8_4.src.rpm
ppc64le: kpatch-patch-4_18_0-305-1-6.el8.ppc64le.rpm kpatch-patch-4_18_0-305-debuginfo-1-6.el8.ppc64le.rpm kpatch-patch-4_18_0-305-debugsource-1-6.el8.ppc64le.rpm kpatch-patch-4_18_0-305_10_2-1-3.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_10_2-debuginfo-1-3.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_10_2-debugsource-1-3.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_12_1-1-2.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_12_1-debuginfo-1-2.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_12_1-debugsource-1-2.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_17_1-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_17_1-debuginfo-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_17_1-debugsource-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_19_1-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_19_1-debuginfo-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_19_1-debugsource-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_3_1-1-5.el8_4.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:4122-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4122
Issue date: 2021-11-03

Topic

An update 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 Red Hat Enterprise Linux important heap overflow use-after-free kpatch-patch

Relevant Releases Architectures

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

Bugs Fixed

1974319 - CVE-2020-36385 kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free

1974491 - CVE-2021-0512 kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c

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