Improper access control in AMD 3rd Gen AMD EPYC™ Processors
Priority LOW 32CWE-284Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-284.
Summary
Improper Access Control in System Management Mode (SMM) may allow an attacker access to the SPI flash potentially leading to arbitrary code execution.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00173 6th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| AMD | 3rd Gen AMD EPYC™ Processors | various | — | No fix listed | CNA |
| AMD | 4th Gen AMD EPYC™ Processors | various | — | No fix listed | CNA |
| AMD | 1st Gen AMD EPYC™ Processors | various and later | — | No fix listed | CNA |
| AMD | 2nd Gen AMD EPYC™ Processors | various | — | No fix listed | CNA |
| AMD | AMD EPYC(TM) Embedded 3000 | various | — | No fix listed | CNA |
| AMD | AMD EPYC(TM) Embedded 7002 | various | — | No fix listed | CNA |
| AMD | AMD EPYC(TM) Embedded 7003 | various | — | No fix listed | CNA |
| AMD | AMD EPYC(TM) Embedded 9003 | various | — | No fix listed | CNA |
- 3rd Gen AMD EPYC™ Processors VendorAMD Affected various Fixed in — No fix listed CNA
- 4th Gen AMD EPYC™ Processors VendorAMD Affected various Fixed in — No fix listed CNA
- 1st Gen AMD EPYC™ Processors VendorAMD Affected various and later Fixed in — No fix listed CNA
- 2nd Gen AMD EPYC™ Processors VendorAMD Affected various Fixed in — No fix listed CNA
- AMD EPYC(TM) Embedded 3000 VendorAMD Affected various Fixed in — No fix listed CNA
- AMD EPYC(TM) Embedded 7002 VendorAMD Affected various Fixed in — No fix listed CNA
- AMD EPYC(TM) Embedded 7003 VendorAMD Affected various Fixed in — No fix listed CNA
- AMD EPYC(TM) Embedded 9003 VendorAMD Affected various Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 3 products
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-20587
- 2026-10-03 Alias added: GHSA-3jmf-c2v9-xc39
References
More AMD vulnerabilities
- TI-2026-36341 AI Tensor Engine for ROCm (AITER) 0.1.14 Unauthenticated RCE via MessageQueue.recv() Pickle Deserialization CVSS 4.0CRITICAL 9.2
- TI-2023-07046 Improper privilege management in AMD Radeon™ RX 5000 Series Graphics Cards CVSS 3.1HIGH 7.8
- TI-2023-04574 GPU kernel implementations susceptible to memory leak CVSS 3.1MEDIUM 6.5
- TI-2023-07042 Information disclosure through error messages in AMD Ryzen™ 3000 Series Desktop… CVSS 3.1MEDIUM 5.5
- TI-2023-23747 PVRIC (PowerVR Image Compression) on Imagination 2018 and later GPU devices offers… CVSS 3.1MEDIUM 5.3
- TI-2022-07839 Improper access control in System Management Mode (SMM) may allow an attacker to write to… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2023-20587 · CVE Program
- CVE-2023-20587 · NVD
- FIRST EPSS
- GHSA-3jmf-c2v9-xc39 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-20587 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences