Unvalidated input in Silicon Labs PSA Attestation service leads to secure memory access from non-secure memory
Priority MEDIUM 40CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
An unvalidated input in a library function responsible for communicating between secure and non-secure memory in Silicon Labs TrustZone implementation allows reading/writing of memory in the secure region of memory from the non-secure region of memory.
Why it matters now
EPSS 0.00569 47th percentileScored 2026-11-07
Fix Fixed GSDK (silabs.com): 4.4.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| silabs.com | GSDK | 1.0 to before 4.4.0 | 4.4.0 | Patch available | CNA |
- GSDK Vendorsilabs.com Affected 1.0 to before 4.4.0 Fixed in 4.4.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:silabs:gecko_software_development_kit:*:*:*:*:*:*:*:* | 1.0.0 to before 4.4.0 | Vulnerable | silabs.com |
- cpe:2.3:a:silabs:gecko_software_development_kit:*:*:*:*:*:*:*:* Versions 1.0.0 to before 4.4.0 Vulnerable ·silabs.com
Remediation
- Fix · CNA GSDK (silabs.com) Fixed in 4.4.0
Timeline
- 2026-10-02 Threatist record created from CVE-2023-4020
- 2026-10-03 Alias added: GHSA-2cr6-32m2-cxhc
References
More silabs.com Gecko Software Development Kit vulnerabilities
- TI-2023-24288 Heap-based buffer overflow in silabs.com Gecko Platform CVSS 3.1CRITICAL 10.0
- TI-2023-14952 Memory corruption in silabs.com Gecko Platform CVSS 3.1CRITICAL 9.8
- TI-2023-12925 Memory corruption in silabs.com Gecko Platform CVSS 3.1CRITICAL 9.8
- TI-2023-12476 Heap-based buffer overflow in silabs.com Gecko Platform CVSS 3.1CRITICAL 9.8
- TI-2023-12937 Memory corruption in silabs.com Gecko Platform CVSS 3.1CRITICAL 9.8
- TI-2023-10642 Heap-based buffer overflow in silabs.com Gecko Platform CVSS 3.1CRITICAL 9.8
Sources
- CVE-2023-4020 · CVE Program
- CVE-2023-4020 · NVD
- FIRST EPSS
- GHSA-2cr6-32m2-cxhc · GitHub Advisory Database · CC BY 4.0
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