{"id":"CVE-2023-4020","details":"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.","modified":"2026-04-12T08:01:21.894540Z","published":"2023-12-15T21:15:08.560Z","references":[{"type":"ADVISORY","url":"https://github.com/SiliconLabs/gecko_sdk/releases"},{"type":"REPORT","url":"https://community.silabs.com/069Vm0000004b95IAA"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/siliconlabs/gecko_sdk","events":[{"introduced":"0"},{"fixed":"124fa19de8c8b3961d21c20857f7df32239786da"}],"database_specific":{"cpe":"cpe:2.3:a:silabs:gecko_software_development_kit:*:*:*:*:*:*:*:*","source":"CPE_FIELD","extracted_events":[{"introduced":"1.0.0"},{"fixed":"4.4.0"}]}}],"versions":["v4.2.0","v4.2.1","v4.2.2","v4.2.3","v4.3.0","v4.3.1","v4.3.2"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-4020.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}