Cryptographic key disclosure or corruption via CCP registers
Published Jun 10, 2025 · Updated Feb 26, 2026
Improper register access control in AMD Secure Processor firmware allows local users to read or alter cryptographic key state. The ASP fails to restrict x86 access to Crypto Co-Processor registers, allowing control of the cryptographic key pointer or index. Administrative code execution on an affected platform is required; successful access can disclose protected data or corrupt cryptographic operations.
Summary
What happened
Improper register access control in AMD Secure Processor firmware allows local users to read or alter cryptographic key state. The ASP fails to restrict x86 access to Crypto Co-Processor registers, allowing control of the cryptographic key pointer or index. Administrative code execution on an affected platform is required; successful access can disclose protected data or corrupt cryptographic operations.
The record
- CVE
- CVE-2023-20599
- Published
- Jun 10, 2025
- Updated
- Feb 26, 2026
- Vendor
- Advanced Micro Devices, Inc.
- Product
- AMD Ryzen™ Embedded V1000 Series Processors
- Classifications
- CWE-1262
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jun 10, 2025CVE publishedPublication date reported by the CVE source.
- Feb 26, 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?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
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
Public exploit references
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Technologies
Your stack
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Your stack
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