Linaro's open source TEE solution called OP-TEE, version 2.4.0 (and older) is vulnerable a timing attack in the Montgomery parts of libMPA in OP-TEE resulting in a compromised private RSA key.
https://github.com/OP-TEE/optee_os/pull/1610
https://github.com/OP-TEE/optee_os/blob/2.5.0/CHANGELOG.md
https://www.op-tee.org/security-advisories/
Source: Mitre, NVD
Published: 2018-01-02
Updated: 2026-06-17
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N
Severity: Medium
Base Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.00364