CVE-2021-26320
MEDIUM
5.5
CVSS Score
Published: November 16, 2021 at 06:05 PM UTC
Updated: June 17, 2026 at 03:43 AM UTC
117 products affected across 1 vendorEpyc 7663 FirmwareEpyc 7713P FirmwareEpyc 7413 Firmware
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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
Description
Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND_START command in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < romepi-sp3_1.0.0.c
Affected range stops below romepi-sp3_1.0.0.c, so it looks safe — our inference, not a vendor statement
amd-epyc-7232p (same device)
v < naplespi-sp3_1.0.0.g
Affected range stops below naplespi-sp3_1.0.0.g, so it looks safe — our inference, not a vendor statement
amd-epyc-7251 (same device)
v < romepi-sp3_1.0.0.c
Affected range stops below romepi-sp3_1.0.0.c, so it looks safe — our inference, not a vendor statement
amd-epyc-7252 (same device)
v < naplespi-sp3_1.0.0.g
Affected range stops below naplespi-sp3_1.0.0.g, so it looks safe — our inference, not a vendor statement
amd-epyc-7261 (same device)
v < romepi-sp3_1.0.0.c
Affected range stops below romepi-sp3_1.0.0.c, so it looks safe — our inference, not a vendor statement
amd-epyc-7262 (same device)
v < romepi-sp3_1.0.0.c
Affected range stops below romepi-sp3_1.0.0.c, so it looks safe — our inference, not a vendor statement
amd-epyc-7272 (same device)
v < naplespi-sp3_1.0.0.g
Affected range stops below naplespi-sp3_1.0.0.g, so it looks safe — our inference, not a vendor statement
amd-epyc-7281 (same device)
v < romepi-sp3_1.0.0.c
Affected range stops below romepi-sp3_1.0.0.c, so it looks safe — our inference, not a vendor statement
amd-epyc-7282 (same device)
v < milanpi-sp3_1.0.0.4
Affected range stops below milanpi-sp3_1.0.0.4, so it looks safe — our inference, not a vendor statement
amd-epyc-72f3 (same device)
v < naplespi-sp3_1.0.0.g
Affected range stops below naplespi-sp3_1.0.0.g, so it looks safe — our inference, not a vendor statement
amd-epyc-7301 (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)
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-295
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