{"id":"CVE-2023-4020","aliases":["EUVD-2023-53913","GHSA-2cr6-32m2-cxhc"],"status":"published","title":"Unvalidated input in Silicon Labs PSA Attestation service leads to secure memory access from non-secure memory","description":"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.","severity":{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00569,"percentile":0.47399,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125","CWE-20","CWE-787"],"published":"2023-12-15T20:37:20Z","modified":"2026-10-28T02:30:33Z","products":[{"vendor":"silabs","product":"gecko_software_development_kit"},{"vendor":"silabs.com","product":"gsdk"}],"references":[{"url":"https://github.com/SiliconLabs/gecko_sdk/releases","tags":["x_transferred","Release Notes","package"]},{"url":"https://community.silabs.com/069Vm0000004b95IAA","tags":["x_transferred","Permissions Required","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-4020","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-2cr6-32m2-cxhc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4020.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-4020","title":"Unvalidated input in Silicon Labs PSA Attestation service leads to secure memory access from non-secure memory","description":"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.","status":"published","published":"2023-12-15T20:37:20.123Z","modified":"2024-09-26T14:11:59.084Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical","assessor":"cna"}],"cwes":["CWE-125","CWE-787"],"updated_at":"2026-11-02T14:35:30.474787Z"}],"euvd":[{"id":"EUVD-2023-53913","description":"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.","status":"published","published":"2023-12-15T20:37:20Z","modified":"2024-09-26T14:11:59Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-03T00:28:09.922822Z"}],"ghsa":[{"id":"GHSA-2cr6-32m2-cxhc","title":"An unvalidated input in a library function responsible for communicating between secure and non...","description":"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.","status":"published","published":"2023-12-15T21:30:29Z","modified":"2024-09-25T18:32:23Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-20","CWE-125"],"updated_at":"2026-11-02T14:58:20.799511Z"}],"nvd":[{"id":"CVE-2023-4020","description":"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.","status":"published","published":"2023-12-15T21:15:08.56Z","modified":"2026-06-17T06:36:55.697Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary"}],"cwes":["CWE-125","CWE-787"],"updated_at":"2026-11-02T14:08:56.329586Z"}],"osv":[{"id":"CVE-2023-4020","title":"Unvalidated input in Silicon Labs PSA Attestation service leads to secure memory access from non-secure memory","description":"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.","status":"published","published":"2023-12-15T20:37:20.123Z","modified":"2026-10-28T02:30:33.822427146Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-125","CWE-787"],"updated_at":"2026-11-02T15:44:33.244128Z"}]}}