{"id":"CVE-2021-40327","details":"Trusted Firmware-M (TF-M) 1.4.0, when Profile Small is used, has incorrect access control. NSPE can access a secure key (held by the Crypto service) based solely on knowledge of its key ID. For example, there is no authorization check associated with the relationship between a caller and a key owner.","modified":"2026-03-14T11:08:23.579909Z","published":"2022-01-13T16:15:07.993Z","references":[{"type":"ADVISORY","url":"https://developer.arm.com/support/arm-security-updates"},{"type":"FIX","url":"https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/"},{"type":"FIX","url":"https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git","events":[{"introduced":"0"},{"last_affected":"7ef9178adad866d48e3af42d8a3129dfab792ed8"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.4.0"}]}}],"versions":["TF-Mv1.0","TF-Mv1.0-RC1","TF-Mv1.0-RC2","TF-Mv1.0-RC3","TF-Mv1.1","TF-Mv1.1-RC1","TF-Mv1.1-RC2","TF-Mv1.2-RC1","TF-Mv1.2-RC2","TF-Mv1.2-RC3","TF-Mv1.2.0","TF-Mv1.3.0","TF-Mv1.3.0-RC1","TF-Mv1.3.0-RC2","TF-Mv1.3.0-RC3","TF-Mv1.4.0","TF-Mv1.4.0-RC1","TF-Mv1.4.0-RC2","TF-Mv1.4.0-RC3","v1.0-beta"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-40327.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}