CVE-2023-4020 json
Unvalidated input in Silicon Labs PSA Attestation service leads to secure memory access from non-secure memory
published 2023-12-15 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-53913
- cvss
- 9.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
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.
Patch / fix
- silabs.com GSDK 4.4.0
Exploit prediction
0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.0 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
- silabs.com GSDK
Classification
References
-
github.com
/SiliconLabs/gecko_sdk/releases
release-notes
-
community.silabs.com
/069Vm0000004b95IAA
permissions-required
Sources
- CVE List CVE-2023-4020
- NVD CVE-2023-4020
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.