If the fix is already committed for any of the vulnerabilities, then the answer is a simple github search away:
https://github.com/openssl/openssl/compare/OpenSSL_1_0_1l......
https://github.com/openssl/openssl/compare/OpenSSL_1_0_2...O...
Some interesting commits:
https://github.com/openssl/openssl/commit/327de270d583e716bc...
https://github.com/openssl/openssl/commit/f5ee5213073870493a...
https://github.com/openssl/openssl/commit/51527f1e3564f210e9...