Summary
Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What type of information could be disclosed by this vulnerability?
Exploiting this vulnerability could allow the disclosure of certain memory address within kernel space. Knowing the exact location of kernel memory could be potentially leveraged by an attacker for other malicious activities.
Do I need to install the Servicing Stack Update and the January 2025 Security Update in any particular order?
**Are there any further steps I need to take to be protected from this vulnerability?
Customers running Windows Server 2016 or older, or Windows 10 version 1607 or older MUST install both the Servicing Stack Update (SSU) and the Security Update for that version to be fully protected from this vulnerability. See ADV990001 | Latest Servicing Stack Updates for the applicable Servicing Stack Update for your operating system version.
Customers whose systems are configured to receive automatic updates do not need to take any further action.
SSUs should always be installed before any new update for Windows, including the latest cumulative update (LCU), Monthly Rollup, or Security Update.
Security updates
10.0.17763.6775 — https://support.microsoft.com/help/5050008
10.0.20348.3091 — https://support.microsoft.com/help/5049983
10.0.19044.5371 — https://support.microsoft.com/help/5049981
10.0.22621.4751 — https://support.microsoft.com/help/5050021
10.0.26100.2894 — https://support.microsoft.com/help/5050009
10.0.25398.1369 — https://support.microsoft.com/help/5049984
10.0.10240.20890 — https://support.microsoft.com/help/5050013
10.0.14393.7699 — https://support.microsoft.com/help/5049993
6.3.9600.22371 — https://support.microsoft.com/help/5050048
Vulnerabilities 1
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Medium 5.5
Windows Kernel Memory Information Disclosure Vulnerability
Windows Kernel Memory Information Disclosure Vulnerability
Revision history
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#1
Information published.
References
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CVE-2025-21316 Windows Kernel Memory Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21316
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss