PyCryptodome before 3.6.6 has an integer overflow in the data_len variable in AESNI.c, related to the AESNI_encrypt and AESNI_decrypt functions, leading to the mishandling of messages shorter than 16 bytes.
CVSS 3.1HIGH 7.5·Network·No auth·No interaction·EPSS 0.01756·Published 2018-08-20·Fixed in 3.6.6CWE-190