Home/CVE/Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler
CVE

CVE-2023-20559

Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler

Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to escalation of privileges.

HIGH · CVSS 8.8 EPSS 0.00393
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-691Insufficient Control Flow Management
▤

Affected Products & Versions

60
amd ryzen 7 5700g firmware< comboam4_v2_pi_1.2.0.6c
amd ryzen 7 5700ge firmware< comboam4_v2_pi_1.2.0.6c
amd ryzen 5 5600g firmware< comboam4_v2_pi_1.2.0.6c
amd ryzen 5 5600ge firmware< comboam4_v2_pi_1.2.0.6c
amd ryzen 3 5300g firmware< comboam4_v2_pi_1.2.0.6c
amd ryzen 3 5300ge firmware< comboam4_v2_pi_1.2.0.6c
amd ryzen 9 5980hx firmware< cezannepi-fp6_1.0.0.9
amd ryzen 9 5980hs firmware< cezannepi-fp6_1.0.0.9
▣

Scoring & Timeline

8.8
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 NVD02 Apr 2023 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
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/resources/product-security/bulletin/amd-sb-1027.htmlVendor Advisory
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