CVE-2021-31979: Windows Kernel Elevation of Privilege Vulnerability

Published Jul 13, 2021
·
Updated

Microsoft Windows kernel contains an unspecified vulnerability that allows for privilege escalation.

Other sources

Windows Kernel Elevation of Privilege Vulnerability

— NVD

Affected Software

69 affected componentsFixes available
Microsoft Windows 10
Microsoft Windows 10=20h2
Microsoft Windows 10=21h1
Microsoft Windows 10=1607
Microsoft Windows 10=1809
Microsoft Windows 10=1909
Microsoft Windows 10=2004
Microsoft Windows 7=sp1
Microsoft Windows 8.1
Microsoft Windows RT 8.1
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
Microsoft Windows Server 2016=20h2
Microsoft Windows Server 2016=2004
Microsoft Windows Server 2019
Microsoft Windows
Microsoft Windows 10 1507<10.0.10240.19003
Microsoft Windows 10 1607<10.0.14393.4530
Microsoft Windows 10 1809<10.0.17763.2061
Microsoft Windows 10 1909<10.0.18363.1679
Microsoft Windows 10 2004<10.0.19041.1110
Microsoft Windows 10 20h2<10.0.19042.1110
Microsoft Windows 10 21h1<10.0.19043.1110
Microsoft Windows Server 2004<10.0.19041.1110
Microsoft Windows Server 2016<10.0.14393.4530
Microsoft Windows Server 2019<10.0.17763.2061
Microsoft Windows Server 20h2<10.0.19042.1110
Microsoft Windows Server 2012 R2<6.3.9600.20069
6.3.9600.20069
Microsoft Windows Server 2012<6.2.9200.23409
6.2.9200.23409
Microsoft Windows Server 2008 R2<6.1.7601.25661
6.1.7601.25661
Microsoft Windows Server 2012<6.2.9200.23409
6.2.9200.23409
Microsoft Windows Server 2008 R2<6.1.7601.25661
6.1.7601.25661
Microsoft Windows Server 2008<6.0.6003.21167
6.0.6003.21167
Microsoft Windows RT 8.1<6.3.9600.20069
6.3.9600.20069
Microsoft Windows Server 2012 R2<6.3.9600.20069
6.3.9600.20069
Microsoft Windows Server 2008<6.0.6003.21167
6.0.6003.21167
Microsoft Windows Server 2008<6.0.6003.21167
6.0.6003.21167
Microsoft Windows 7<6.1.7601.25661
6.1.7601.25661
Microsoft Windows Server 2008<6.0.6003.21167
6.0.6003.21167
Microsoft Windows 8.1 for 32-bit systems<6.3.9600.20069
6.3.9600.20069
Microsoft Windows 8.1 for x64-based systems<6.3.9600.20069
6.3.9600.20069
Microsoft Windows Server 2016<10.0.14393.4530
10.0.14393.4530
Microsoft Windows 7<6.1.7601.25661
6.1.7601.25661
Microsoft Windows 10=1607
10.0.14393.4530
Microsoft Windows Server 2016<10.0.14393.4530
10.0.14393.4530
Microsoft Windows 10<10.0.10240.19003
10.0.10240.19003
Microsoft Windows 10<10.0.10240.19003
10.0.10240.19003
Microsoft Windows 10=20H2
10.0.19042.1110
Microsoft Windows 10=20H2
10.0.19042.1110
Microsoft Windows Server=20H2
10.0.19042.1110
Microsoft Windows 10=2004
10.0.19041.1110
Microsoft Windows 10=1607
10.0.14393.4530
Microsoft Windows 10=2004
10.0.19041.1110
Microsoft Windows Server=2004
10.0.19041.1110
Microsoft Windows 10=21H1
10.0.19043.1110
Microsoft Windows 10=1909
10.0.18363.1679
Microsoft Windows 10=1909
10.0.18363.1679
Microsoft Windows 10=21H1
10.0.19043.1110
Microsoft Windows 10=2004
10.0.19041.1110
Microsoft Windows 10=21H1
10.0.19043.1110
Microsoft Windows Server 2019<10.0.17763.2061
10.0.17763.2061
Microsoft Windows Server 2019<10.0.17763.2061
10.0.17763.2061
Microsoft Windows 10=1809
10.0.17763.2061
Microsoft Windows 10=1809
10.0.17763.2061
Microsoft Windows 10=1909
10.0.18363.1679
Microsoft Windows 10=1809
10.0.17763.2061

Remediation

Patch Available

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31979

Patch Available

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31979

Event History

Jul 13, 2021
CVE Published
via Microsoft·02:00 PM
Known Exploited
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
Jul 14, 2021
CVE Published
via MITRE·05:53 PM
Data Sourced
via MITRE·05:53 PM
DescriptionSeverity
Data Sourced
via NVD·06:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is CVE-2021-31979?

CVE-2021-31979 is a Windows Kernel Privilege Escalation Vulnerability.

2

How severe is CVE-2021-31979?

CVE-2021-31979 has a severity rating of 7.8 (high).

3

Which software is affected by CVE-2021-31979?

Microsoft Windows 10 (versions 20H2, 21H1, 1607, 1809, 1909, 2004), Windows 7 SP1, Windows 8.1, Windows RT 8.1, Windows Server 2008 (SP2), Windows Server 2008 R2 SP1, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 (versions 20H2, 2004), and Windows Server 2019 are affected by CVE-2021-31979.

4

How do I fix the CVE-2021-31979 vulnerability?

To fix the CVE-2021-31979 vulnerability, Microsoft has provided a security update, which should be installed on the affected systems.

5

Where can I find more information about CVE-2021-31979?

More information about CVE-2021-31979 can be found on the Microsoft Security Advisory page: [link](https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31979).

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