cryptography NULL pointer deference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash override

Python-cryptography: bleichenbacher timing oracle attack against rsa decryption - incomplete fix for cve-2020-25659

cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

The cryptography package before 41.0.2 for Python mishandles SSH certificates that have critical options

HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size