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Red Hat Enterprise Linux 8.1 RHSA-2022-0823 Crucial: Kernel Security Patch

red hat
Calendar Grey March 10, 2022
Dist Redhat Esm H88
Critical kernel patch released for RHEL 8.1 rated as High, mitigating risks of privilege escalation and additional vulnerabilities.
An update for kernel is now available for Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

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: improper initialization of the "flags" member of the new pipe_buffer (CVE-2022-0847)
* 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: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)
* kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)
* kernel: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)
* kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)
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 kernel update privilege escalation exploit important local access

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-2021-4083 https://access.redhat.com/security/cve/CVE-2022-0330 https://access.redhat.com/security/cve/CVE-2022-0492 https://access.redhat.com/security/cve/CVE-2022-0847 https://access.redhat.com/security/cve/CVE-2022-22942 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/security/vulnerabilities/RHSB-2022-002

Package List

Red Hat Enterprise Linux BaseOS E4S (v. 8.1):
Source: kernel-4.18.0-147.64.1.el8_1.src.rpm
aarch64: bpftool-4.18.0-147.64.1.el8_1.aarch64.rpm bpftool-debuginfo-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-core-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-cross-headers-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-debug-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-debug-core-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-debug-debuginfo-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-debug-devel-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-debug-modules-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-debug-modules-extra-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-debuginfo-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-devel-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-headers-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-modules-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-modules-extra-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-tools-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-tools-debuginfo-4.18.0-147.64.1.el8_1.aarch64.rpm kernel-tools-libs-4.18.0-147.64.1.el8_1.aarch64.rpm perf-4.18.0-147.64.1.el8_1.aarch64.rpm perf-debuginfo-4.18.0-147.64.1.el8_1.aarch64.rpm python3-perf-4.18.0-147.64.1.el8_1.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:0823-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0823
Issue date: 2022-03-10

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.1Update Services for SAP Solutions.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 kernel update privilege escalation exploit important local access

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS E4S (v. 8.1) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

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

2029923 - CVE-2021-4083 kernel: fget: check that the fd still exists after getting a ref to it

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

2042404 - CVE-2022-0330 kernel: possible privileges escalation due to missing TLB flush

2044809 - CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation

2051505 - CVE-2022-0492 kernel: cgroups v1 release_agent feature may allow privilege escalation

2060795 - CVE-2022-0847 kernel: improper initialization of the "flags" member of the new pipe_buffer

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