Improper Input Validation
A flaw was found in the way Samba versions 3.x, 4.0.x prior to 4.13.14, 4.14.x prior to 4.14.10, 4.15.x prior to 4.15.2 maps domain users to local users. An authenticated attacker could use this flaw to cause possible privilege escalation.
CWE-20 - Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.