CVE-2023-20559
HIGH
8.8
CVSS Score
Published: March 23, 2023 at 06:49 PM UTC
Updated: June 17, 2026 at 05:30 AM UTC
185 products affected across 1 vendorRyzen 5 5600HS FirmwareRyzen 5 5600U FirmwareRyzen 5 5600H Firmware
Using Ryzen™ 2000 Series by AMD?
Get instant alerts when new vulnerabilities affect Ryzen™ 2000 Series - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
HIGH8.8
Exploit prediction
EPSS 0.7%
SSVC
No known exploit
Description
Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to escalation of privileges.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < comboam4v2_pi_1.2.0.6c
Affected range stops below comboam4v2_pi_1.2.0.6c, so it looks safe — our inference, not a vendor statement
amd-ryzen-3-2200u (same device)
v < comboam4v2_pi_1.2.0.6c
Affected range stops below comboam4v2_pi_1.2.0.6c, so it looks safe — our inference, not a vendor statement
amd-ryzen-3-2300u (same device)
All versions
v < comboam4_v2_pi_1.2.0.6c
Affected range stops below comboam4_v2_pi_1.2.0.6c, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
Vendor Advisory
Source: [email protected]
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-1027.htmlSSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
8.8HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-691
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card