CVE-2025-0040 Details
Description
Improper access control between the Joint Test Action Group (JTAG) and Advanced Extensible Interface (AXI) could allow an attacker with physical access to read or overwrite the contents of cross-chip debug (XCD) registers potentially resulting in loss of data integrity or confidentiality.
A vulnerability exists in AMD Ryzen and Ryzen Embedded series processors due to improper access control between the Joint Test Action Group (JTAG) and Advanced Extensible Interface (AXI). This flaw could enable an attacker with physical access to read or overwrite the contents of cross-chip debug registers, potentially compromising data integrity or confidentiality.
Users are advised to update to the Platform Initialization (PI) firmware version PhoenixPI-FP8-FP7_1.2.0.B, released on March 12, 2025. For AMD Ryzen Embedded processors, the recommended update is to version EmbeddedPhoenixPI-FP7r2_1.0.0.2, available since June 18, 2025.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No CVSS 3.x data is available for this CVE.
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 15, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
No affected product data is available for this CVE.
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 15, 2026 | New CVE Received | [email protected] |