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Red Hat Security Advisory
Synopsis: Important: kernel security update
Advisory ID: RHSA-2022:1104-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:1104
Issue date: 2022-03-29
CVE Names: CVE-2020-0466 CVE-2021-0920 CVE-2021-4083
CVE-2022-0330
====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 7.4
Advanced Update Support.
Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Server AUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* kernel: use after free in eventpoll.c may lead to escalation of privilege
(CVE-2020-0466)
* kernel: Use After Free in unix_gc() which could result in a local
privilege escalation (CVE-2021-0920)
* 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)
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.
4. 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.
5. Bugs fixed (https://bugzilla.redhat.com/):
1920480 - CVE-2020-0466 kernel: use after free in eventpoll.c may lead to escalation of privilege
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
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 7.4):
Source:
kernel-3.10.0-693.99.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-693.99.1.el7.noarch.rpm
kernel-doc-3.10.0-693.99.1.el7.noarch.rpm
x86_64:
kernel-3.10.0-693.99.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.99.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.99.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.99.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.99.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.99.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.99.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.99.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.99.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.99.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.99.1.el7.x86_64.rpm
perf-3.10.0-693.99.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.99.1.el7.x86_64.rpm
python-perf-3.10.0-693.99.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.99.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.4):
x86_64:
kernel-debug-debuginfo-3.10.0-693.99.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.99.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.99.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.99.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.99.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.99.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.99.1.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2020-0466
https://access.redhat.com/security/cve/CVE-2021-0920
https://access.redhat.com/security/cve/CVE-2021-4083
https://access.redhat.com/security/cve/CVE-2022-0330
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <[email protected]>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2022 Red Hat, Inc.
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