CVE-2026-21222: Windows Kernel Information Disclosure Vulnerability
Insertion of sensitive information into log file in Windows Kernel allows an authorized attacker to disclose information locally.
Other sources
Windows Kernel Information Disclosure Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23022Patch KB5075970 - Upgrade
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Fixed in 10.0.14393.8868Patch KB5075999 - Upgrade
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Fixed in 10.0.26100.7840Fixed in 10.0.26100.7781Patch KB5077212 - Upgrade
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Fixed in 10.0.22631.6649Patch KB5075941 - Upgrade
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Fixed in 10.0.26100.32370Fixed in 10.0.26100.32313Patch KB5075942 - Upgrade
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Fixed in 10.0.19044.6937Patch KB5075912 - Upgrade
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Fixed in 10.0.20348.4773Fixed in 10.0.20348.4711Patch KB5075943 - Upgrade
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Fixed in 10.0.25398.2149Patch KB5075897 - Upgrade
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Fixed in 10.0.17763.8389Patch KB5075904 - Upgrade
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Fixed in 10.0.19045.6937Patch KB5075912
Event History
Frequently Asked Questions
What is the severity of CVE-2026-21222?
CVE-2026-21222 has a critical severity level due to its potential for disclosing sensitive information.
How do I fix CVE-2026-21222?
To fix CVE-2026-21222, you should apply the relevant security patches provided by Microsoft.
Which versions of Windows are affected by CVE-2026-21222?
CVE-2026-21222 affects multiple Windows versions including Windows 10, Windows 11, and various Windows Server editions.
Can CVE-2026-21222 be exploited locally?
Yes, CVE-2026-21222 can be exploited locally by an authorized user to disclose sensitive information.
Is there a workaround for CVE-2026-21222?
There is no specific workaround for CVE-2026-21222; the recommended solution is to apply the provided patches.