Changes: https://github.com/ARMmbed/mbedtls/releases/tag/v2.27.0 https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0 Security advisories: https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-07-1 https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-07-2 https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-12
