Home/CVE/Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management
CVE

CVE-2021-46749

Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management

Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox checksum calculation triggering a data abort, resulting in a potential denial of service.

HIGH · CVSS 7.5 EPSS 0.00536
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-125Out-of-bounds Read
CWE-125Out-of-bounds Read
▤

Affected Products & Versions

29
amd ryzen 5300g firmwareall versions
amd ryzen 5300ge firmwareall versions
amd ryzen 5500 firmwareall versions
amd ryzen 5600 firmwareall versions
amd ryzen 5600g firmwareall versions
amd ryzen 5600ge firmwareall versions
amd ryzen 5600x firmwareall versions
amd ryzen 5700g firmwareall versions
▣

Scoring & Timeline

7.5
HIGH · 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 NVD09 May 2023 · 07:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
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-4001Vendor Advisory
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