Cross-context data disclosure via stale RSB predictions
Published Aug 18, 2022 · Updated May 5, 2025
Information disclosure in some Intel Processors allows local users to read cross-context data through transient execution. After a VM exit or IBPB barrier, the return stack buffer can predict an unbalanced RET from the most recent pre-barrier CALL target instead of isolating execution contexts. Exploitation requires local low-privilege execution and an affected eIBRS processor; the documented consequence is data disclosure without integrity or availability impact.
Summary
What happened
Information disclosure in some Intel Processors allows local users to read cross-context data through transient execution. After a VM exit or IBPB barrier, the return stack buffer can predict an unbalanced RET from the most recent pre-barrier CALL target instead of isolating execution contexts. Exploitation requires local low-privilege execution and an affected eIBRS processor; the documented consequence is data disclosure without integrity or availability impact.
The record
- CVE
- CVE-2022-26373
- Published
- Aug 18, 2022
- Updated
- May 5, 2025
- Vendor
- Topcon Positioning Systems, Inc.
- Product
- Intel Processors
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 18, 2022CVE publishedPublication date reported by the CVE source.
- May 5, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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- Affected versionversion=See references
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What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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