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Red Hat Enterprise Linux 8.2 RHSA-2022:0636-01 Important Kernel Fix

red hat
Calendar Grey February 22, 2022
Dist Redhat Esm H88
A kernel upgrade for Red Hat Enterprise Linux 8.2 addresses significant security vulnerabilities. Discover the details here.
An update for kernel 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

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: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)
* kernel: use-after-free in RDMA listen() (CVE-2021-4028)
* kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155)
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):
* bpf: update to v5.7 (BZ#2019883)
* Backport leftover migrate_disable BPF related change (BZ#2027687)
* assuming atomic context at include/linux/filter.h:597 (BZ#2043427)

Topics%20covered

Topics Covered

security advisory local privilege escalation bug fix Red Hat Enterprise Linux important kernel fix data leak

References

https://access.redhat.com/security/cve/CVE-2021-0920 https://access.redhat.com/security/cve/CVE-2021-4028 https://access.redhat.com/security/cve/CVE-2021-4155 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.2):
Source: kernel-4.18.0-193.75.1.el8_2.src.rpm
aarch64: bpftool-4.18.0-193.75.1.el8_2.aarch64.rpm bpftool-debuginfo-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-core-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-cross-headers-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-debug-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-debug-core-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-debug-debuginfo-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-debug-devel-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-debug-modules-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-debug-modules-extra-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-debuginfo-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-devel-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-headers-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-modules-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-modules-extra-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-tools-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-tools-debuginfo-4.18.0-193.75.1.el8_2.aarch64.rpm kernel-tools-libs-4.18.0-193.75.1.el8_2.aarch64.rpm perf-4.18.0-193.75.1.el8_2.aarch64.rpm perf-debuginfo-4.18.0-193.75.1.el8_2.aarch64.rpm python3-perf-4.18.0-193.75.1.el8_2.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:0636-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0636
Issue date: 2022-02-22

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.2Extended 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 local privilege escalation bug fix Red Hat Enterprise Linux important kernel fix data leak

Relevant Releases Architectures

Red Hat CodeReady Linux Builder EUS (v. 8.2) - aarch64, ppc64le, x86_64

Red Hat Enterprise Linux BaseOS EUS (v. 8.2) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

2027201 - CVE-2021-4028 kernel: use-after-free in RDMA listen()

2031930 - CVE-2021-0920 kernel: Use After Free in unix_gc() which could result in a local privilege escalation

2034813 - CVE-2021-4155 kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL

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