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CVE-2022-44684: Windows Local Session Manager (LSM) Denial of Service Vulnerability

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-20 · updated 2026-06-17

Description

Windows Local Session Manager (LSM) Denial of Service Vulnerability

Affected products

• Microsoft Windows 10 20H2: before 10.0.19042.2364 — fixed in 10.0.19042.2364
• Microsoft Windows 10 21H1: before 10.0.19043.2364 — fixed in 10.0.19043.2364
• Microsoft Windows 10: before 10.0.19044.2364 — fixed in 10.0.19044.2364
• Microsoft Windows 10: before 10.0.19045.2364 — fixed in 10.0.19045.2364
• Microsoft Windows 11 21H2: before 10.0.22000.1335 — fixed in 10.0.22000.1335
• Microsoft Windows 11: before 10.0.22621.993 — fixed in 10.0.22621.993
• Microsoft Windows Server 2022: all versions
• 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 10.0.19043.0 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 11 21H2: from 10.0.0 before 10.0.22000.1335 — fixed in 10.0.22000.1335
• Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.993 — fixed in 10.0.22621.993
• Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.1366 — fixed in 10.0.20348.1366
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1009 — fixed in 10.0.25398.1009

How to fix

Upgrade to a fixed version: 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 11 21H2 10.0.22000.1335; Microsoft Windows 11 10.0.22621.993; 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 11 21H2 10.0.22000.1335; Microsoft Windows 11 10.0.22621.993. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-44684
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-44684

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