Local disclosure via improperly locked sensitive memory
Published Jan 10, 2023 · Updated Jan 1, 2025
Information disclosure in the Windows Overlay Filter allows local users to read sensitive memory from affected Windows builds. Microsoft maps the flaw to sensitive data stored in improperly locked memory, but has not disclosed the affected routine or exact read path. Exploitation requires low privileges and a high-complexity local race, and the documented consequence is confidentiality loss without modification or service interruption.
Summary
What happened
Information disclosure in the Windows Overlay Filter allows local users to read sensitive memory from affected Windows builds. Microsoft maps the flaw to sensitive data stored in improperly locked memory, but has not disclosed the affected routine or exact read path. Exploitation requires low privileges and a high-complexity local race, and the documented consequence is confidentiality loss without modification or service interruption.
The record
- CVE
- CVE-2023-21766
- Published
- Jan 10, 2023
- Updated
- Jan 1, 2025
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-591
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 10, 2023CVE publishedPublication date reported by the CVE source.
- Jan 1, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.10240.0 <10.0.10240.19685
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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