Arm Mbed TLS before 2.14.1, before 2.7.8, and before 2.1.17 allows a local unprivileged attacker to recover the plaintext of RSA decryption, which is used in RSA-without-(EC)DH(E) cipher suites.
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2018-03
https://tls.mbed.org/tech-updates/releases/mbedtls-2.14.1-2.7.8-and-2.1.17-released