Home/CVE/Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential informa
CVE

CVE-2021-26404

Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential informa

Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.

MEDIUM · CVSS 5.5 EPSS 0.00064
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
CWE-20Improper Input Validation
▤

Affected Products & Versions

23
amd epyc 7003 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
amd epyc 7443 firmware< milanpi-sp3_1.0.0.9
▣

Scoring & Timeline

5.5
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:H/I:N/A:N
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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