Critical severity · published Nov 14, 2023
CVE-2023-20596
Improper input validation in the SMM Supervisor may allow an attacker with a compromised SMI handler to gain Ring0 access potentially leading to arbitrary code execution
9.8
CVSS
1%
EPSS
No
On KEV
Description
Improper input validation in the SMM Supervisor may allow an attacker with a compromised SMI handler to gain Ring0 access potentially leading to arbitrary code execution.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 64% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
R3
Ryzen 3 5125c Firmware · Amd
before cezannepi-fp6_1.0.0.fa · source: NVD
R3
Ryzen 3 5300g Firmware · Amd
before comboam4v2_1.2.0.b · source: NVD
R3
Ryzen 3 5300ge Firmware · Amd
before comboam4v2_1.2.0.b · source: NVD
R3
Ryzen 3 5400u Firmware · Amd
before cezannepi-fp6_1.0.0.fa · source: NVD
R3
Ryzen 3 5425u Firmware · Amd
before cezannepi-fp6_1.0.0.fa · source: NVD
R3
Ryzen 3 7335u Firmware · Amd
before rembrandtpi-fp7_1.0.0.9b · source: NVD
R5
Ryzen 5 5500h Firmware · Amd
before cezannepi-fp6_1.0.0.fa · source: NVD
R5
Ryzen 5 5560u Firmware · Amd
before cezannepi-fp6_1.0.0.fa · source: NVD
R5
Ryzen 5 5600g Firmware · Amd
before comboam4v2_1.2.0.b · source: NVD
R5
Ryzen 5 5600ge Firmware · Amd
before comboam4v2_1.2.0.b · source: NVD
R5
Ryzen 5 5600h Firmware · Amd
before cezannepi-fp6_1.0.0.fa · source: NVD
R5
Ryzen 5 5600hs Firmware · Amd
before cezannepi-fp6_1.0.0.fa · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-20596
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-20596
Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7011
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