Speculative Leaks Security Notice
Bulletin ID: AMD-SB-7007
Potential Impact: Loss of Confidentiality
Severity: Low
Summary
External researchers have reported that on some AMD processors a division-by-zero can potentially return speculative data.
CVE Details
Refer to Glossary for explanation of terms
CVE |
Severity |
CVE Description |
CVE-2023-20588 |
Low |
A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss of confidentiality. |
Affected Products
Datacenter
AMD EPYC™ 7001 Processors
Desktop
AMD Athlon™ 3000 Series Processors with Radeon™ Graphics
AMD Ryzen™ 3000 Series Processors with Radeon™ Graphics
Mobile
AMD Athlon™ PRO 3000 Series Processors with Radeon™ Vega Graphics
AMD Ryzen™ PRO 3000 Series Processors with Radeon™ Vega Graphics
Mitigation
For affected products, AMD recommends following software development best practices. Developers can mitigate this issue by ensuring that no privileged data is used in division operations prior to changing privilege boundaries. AMD believes that the potential impact of this vulnerability is low because it requires local access.
In addition, the data that is potentially leaked may not be privileged, and an attacker does not have control of the division operation which determines that data. We also believe impact is limited to products prior to “Zen 2” based architectures and are not aware of any existing exploits based on this vulnerability.
Acknowledgement
AMD thanks Jana Hofmann, Emanuele Vannacci, Cédric Fournet, Boris Köpf, and Oleksii Oleksenko of Azure Research, Microsoft and Vrije Universiteit Amsterdam for reporting these issues.
Revisions
| Revision Date | Description |
| 08-08-2023 | Initial publication |
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