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Red Hat: RHSA-2021-4650 Important: Kernel Update Threat

red hat
Calendar Grey November 15, 2021
Dist Redhat Esm H88
Essential kernel upgrade for CentOS Stream involves significant vulnerability patches, error corrections, and improvements.
An update for kernel 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

The system must be rebooted for this update to take effect.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type (CVE-2021-43267)
* kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)
* kernel: fuse: stall on CPU can occur because a retry loop continually finds the same bad inode (CVE-2021-28950)
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.
Bug Fix(es):
* Fix repeated xhci wake after suspend due to uncleared internal wake state (BZ#2003789)
* CephFS mount points return "permission denied" (BZ#2017099)
Enhancement(s):
* Update qla2xxx driver to latest upstream (BZ#2014150)

Topics%20covered

Topics Covered

security advisory kernel update security fix system enhancement Red Hat Enterprise Linux important bug resolution

References

https://access.redhat.com/security/cve/CVE-2021-20317 https://access.redhat.com/security/cve/CVE-2021-28950 https://access.redhat.com/security/cve/CVE-2021-43267 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v.8.4):
Source: kernel-4.18.0-305.28.1.el8_4.src.rpm
aarch64: bpftool-4.18.0-305.28.1.el8_4.aarch64.rpm bpftool-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-core-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-cross-headers-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-debug-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-debug-core-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-debug-devel-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-debug-modules-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-debug-modules-extra-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-devel-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-headers-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-modules-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-modules-extra-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-tools-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm kernel-tools-libs-4.18.0-305.28.1.el8_4.aarch64.rpm perf-4.18.0-305.28.1.el8_4.aarch64.rpm perf-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm python3-perf-4.18.0-305.28.1.el8_4.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:4650-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4650
Issue date: 2021-11-15

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.4Extended 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 kernel update security fix system enhancement Red Hat Enterprise Linux important bug resolution

Relevant Releases Architectures

Red Hat CodeReady Linux Builder EUS (v. 8.4) - aarch64, ppc64le, x86_64

Red Hat Enterprise Linux BaseOS EUS (v.8.4) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1941762 - CVE-2021-28950 kernel: fuse: stall on CPU can occur because a retry loop continually finds the same bad inode

2005258 - CVE-2021-20317 kernel: timer tree corruption leads to missing wakeup and system freeze

2020362 - CVE-2021-43267 kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type

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