01 Record
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.
UnratedPUBLISHEDCNA: AMD
CNA base scoreUnratedNo CNA CVSS vector
02 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.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.04% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 63.9% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-11-14 18:55Z2 YR AGO
- Last updated
- 2024-08-02 09:05Z2 YR AGO
- Reserved
- 2022-10-27
- Assigning CNA
- AMD
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- No CWE assigned
- Data version
- 5.1
- Document digest
- bc301b4969e385a558ad6ae29ca3f98cbe53e0ec1deb4219f70efb03f0fbcb83
05 Affected products
VendorProductVersionsPlatforms
AMDRyzen™ 5000 Series Desktop Processor with Radeon™ Graphics Formerly codenamed “Cezanne” AM4variousx86
AMDRyzen™ 7000 Series Desktop Processors with Radeon™ Graphics Formerly codenamed “Raphael”variousx86