CVE-2021-26403
MEDIUM
6.5
CVSS Score
Published: January 10, 2023 at 08:56 PM UTC
Updated: June 17, 2026 at 03:43 AM UTC
82 products affected across 1 vendorEpyc 7402 FirmwareEpyc 7402P FirmwareEpyc 7542 Firmware
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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit
Description
Insufficient checks in SEV may lead to a malicious hypervisor disclosing the launch secret potentially resulting in compromise of VM confidentiality.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < naplespi_1.0.0.e
Affected range stops below naplespi_1.0.0.e, so it looks safe — our inference, not a vendor statement
amd-epyc-7001 (same device)
v < romepi_1.0.0.9
Affected range stops below romepi_1.0.0.9, so it looks safe — our inference, not a vendor statement
amd-epyc-7002 (same device)
v < romepi_1.0.0.9
Affected range stops below romepi_1.0.0.9, so it looks safe — our inference, not a vendor statement
amd-epyc-7232p (same device)
v < naplespi_1.0.0.e
Affected range stops below naplespi_1.0.0.e, so it looks safe — our inference, not a vendor statement
amd-epyc-7251 (same device)
v < romepi_1.0.0.9
Affected range stops below romepi_1.0.0.9, so it looks safe — our inference, not a vendor statement
amd-epyc-7252 (same device)
v < naplespi_1.0.0.e
Affected range stops below naplespi_1.0.0.e, so it looks safe — our inference, not a vendor statement
amd-epyc-7261 (same device)
v < romepi_1.0.0.9
Affected range stops below romepi_1.0.0.9, so it looks safe — our inference, not a vendor statement
amd-epyc-7262 (same device)
v < romepi_1.0.0.9
Affected range stops below romepi_1.0.0.9, so it looks safe — our inference, not a vendor statement
amd-epyc-7272 (same device)
v < naplespi_1.0.0.e
Affected range stops below naplespi_1.0.0.e, so it looks safe — our inference, not a vendor statement
amd-epyc-7281 (same device)
v < romepi_1.0.0.9
Affected range stops below romepi_1.0.0.9, so it looks safe — our inference, not a vendor statement
amd-epyc-7282 (same device)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
Vendor Advisory
Source: [email protected]
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032SSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
6.5MEDIUMCISA-ADP
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-345
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