CVE-2022-44673: Windows Client Server Run-time Subsystem (CSRSS) Elevation of Privilege Vulnerability

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-13 · updated 2026-06-17

Description

Windows Client Server Run-time Subsystem (CSRSS) Elevation of Privilege Vulnerability

Affected products

Microsoft Windows 10 Version 1607: 20h2, 21h1, 21h2, 22h2, 1607, 1809
Microsoft Windows 7: all versions
Microsoft Windows 8.1: all versions
Microsoft Windows Server 2008: all versions
Microsoft Windows 10 Version 1507: from 10.0.10240.0 before 10.0.10240.19624 — fixed in 10.0.10240.19624
Microsoft Windows 10 1607: from 10.0.14393.0 before 10.0.14393.5582 — fixed in 10.0.14393.5582
Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.3770 — fixed in 10.0.17763.3770
Microsoft Windows 10 20H2: from 10.0.0 before 10.0.19042.2364 — fixed in 10.0.19042.2364
Microsoft Windows 10 21H1: from 10.0.0 before 10.0.19043.2364 — fixed in 10.0.19043.2364
Microsoft Windows 10: from 10.0.19044.0 before 10.0.19044.2364 — fixed in 10.0.19044.2364
Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.2364 — fixed in 10.0.19045.2364
Microsoft Windows 7: from 6.1.0 before 6.1.7601.26266 — fixed in 6.1.7601.26266
Microsoft Windows 8.1: from 6.3.0 before 6.3.9600.20721 — fixed in 6.3.9600.20721
Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.21815 — fixed in 6.0.6003.21815

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.19624; Microsoft Windows 10 1607 10.0.14393.5582; Microsoft Windows 10 10.0.17763.3770; Microsoft Windows 10 20H2 10.0.19042.2364; Microsoft Windows 10 21H1 10.0.19043.2364; Microsoft Windows 10 10.0.19044.2364; Microsoft Windows 10 10.0.19045.2364; Microsoft Windows 7 6.1.7601.26266; Microsoft Windows 8.1 6.3.9600.20721; Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21815. Check the vendor advisory for mitigations.

References

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