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MSRC compact vulnerability detail

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.

Severity
Important
Impact
Information Disclosure
CVSS
5.5 base · 4.8 temporal
Release
2026-02-10
Signals
Windows Kernel Information Disclosure Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
CWE-532: Insertion of Sensitive Information into Log File
Patch Diff
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Resolved binary override
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Description
Insertion of sensitive information into log file in Windows Kernel allows an authorized attacker to disclose information locally.
FAQ / Articles
FAQ
What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if an attacker successfully exploited this vulnerability is Kernel memory read - unintentional read access to memory contents in kernel space from a user mode process.
Windows Kernel Information Disclosure Vulnerability
Insertion of sensitive information into log file in Windows Kernel allows an authorized attacker to disclose information locally.