Home/CVE/Insufficient validation of address mapping to IO in ASP (AMD Secure Processor) may result in a loss of memory integrity
CVE

CVE-2021-26396

Insufficient validation of address mapping to IO in ASP (AMD Secure Processor) may result in a loss of memory integrity

Insufficient validation of address mapping to IO in ASP (AMD Secure Processor) may result in a loss of memory integrity in the SNP guest.

MEDIUM · CVSS 4.4 EPSS 0.00027
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-345Insufficient Verification of Data Authenticity
CWE-345Insufficient Verification of Data Authenticity
▤

Affected Products & Versions

24
amd epyc 7003 firmware< milanpi-sp3_1.0.0.9
amd epyc 72f3 firmware< milanpi-sp3_1.0.0.9
amd epyc 7313 firmware< milanpi-sp3_1.0.0.9
amd epyc 7313p firmware< milanpi-sp3_1.0.0.9
amd epyc 7343 firmware< milanpi-sp3_1.0.0.9
amd epyc 7373x firmware< milanpi-sp3_1.0.0.9
amd epyc 73f3 firmware< milanpi-sp3_1.0.0.9
amd epyc 7413 firmware< milanpi-sp3_1.0.0.9
▣

Scoring & Timeline

4.4
MEDIUM · CVSS v3.1 · psirt@amd.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD11 Jan 2023 · 08:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032Vendor Advisory
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