Query-data disclosure via asynchronous timeout result mix-up
Published Nov 9, 2022 · Updated Aug 10, 2026
Information disclosure in Microsoft .NET SqlClient packages allows attackers to receive another query's data after an async timeout. Under high load, System.Data.SqlClient and Microsoft.Data.SqlClient mishandle a timeout from an asynchronously executed query or command and return an incorrect result to the caller. Exposure requires an application that uses an affected direct or transitive package to communicate with Microsoft SQL Server; the bounded consequence is unintended query-data disclosure.
Summary
What happened
Information disclosure in Microsoft .NET SqlClient packages allows attackers to receive another query's data after an async timeout. Under high load, System.Data.SqlClient and Microsoft.Data.SqlClient mishandle a timeout from an asynchronously executed query or command and return an incorrect result to the caller. Exposure requires an application that uses an affected direct or transitive package to communicate with Microsoft SQL Server; the bounded consequence is unintended query-data disclosure.
The record
- CVE
- CVE-2022-41064
- Published
- Nov 9, 2022
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- NuGet
- Classifications
- Unavailable
- Attack vector
- adjacent
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 9, 2022CVE publishedPublication date reported by the CVE source.
- Aug 10, 2026Record 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=1.0.0 <2.1.2
- Affected versionversion=1.0.0 <4.8.4
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
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Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
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Technologies
Your stack
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Your stack
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