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CVE-2023-36803: Windows Kernel Information Disclosure Vulnerability

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-12 · updated 2026-06-17
• Weakness: CWE-126

Description

Windows Kernel Information Disclosure Vulnerability

Affected products

• Microsoft Windows 10 1607: before 10.0.14393.6252 — fixed in 10.0.14393.6252
• Microsoft Windows 10: before 10.0.17763.4851 — fixed in 10.0.17763.4851
• Microsoft Windows 10: before 10.0.19044.3448 — fixed in 10.0.19044.3448
• Microsoft Windows 10: before 10.0.19045.3448 — fixed in 10.0.19045.3448
• Microsoft Windows 11 21H2: before 10.0.22000.2416 — fixed in 10.0.22000.2416
• Microsoft Windows 11: before 10.0.22621.2275 — fixed in 10.0.22621.2275
• Microsoft Windows Server 2016: all versions
• Microsoft Windows Server 2019: all versions
• Microsoft Windows Server 2022: all versions
• Microsoft Windows 10 1607: from 10.0.14393.0 before 10.0.14393.6252 — fixed in 10.0.14393.6252
• Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.4851 — fixed in 10.0.17763.4851
• Microsoft Windows 10: from 10.0.19043.0 before 10.0.19044.3448 — fixed in 10.0.19044.3448
• Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.3448 — fixed in 10.0.19045.3448
• Microsoft Windows 11 21H2: from 10.0.0 before 10.0.22000.2416 — fixed in 10.0.22000.2416
• Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.2283 — fixed in 10.0.22621.2283
• Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.6252 — fixed in 10.0.14393.6252
• Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.4851 — fixed in 10.0.17763.4851
• Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.1970 — fixed in 10.0.20348.1970

How to fix

Upgrade to a fixed version: Microsoft Windows 10 1607 10.0.14393.6252; Microsoft Windows 10 10.0.17763.4851; Microsoft Windows 10 10.0.19044.3448; Microsoft Windows 10 10.0.19045.3448; Microsoft Windows 11 21H2 10.0.22000.2416; Microsoft Windows 11 10.0.22621.2275; Microsoft Windows 10 1607 10.0.14393.6252; Microsoft Windows 10 10.0.17763.4851; Microsoft Windows 10 10.0.19044.3448; Microsoft Windows 10 10.0.19045.3448; Microsoft Windows 11 21H2 10.0.22000.2416; Microsoft Windows 11 10.0.22621.2283. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36803
• http://packetstormsecurity.com/files/175109/Microsoft-Windows-Kernel-Out-Of-Bounds-Reads-Memory-Disclosure.html
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36803

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