MP-SPDZ v0.3.8 was discovered to contain a stack overflow via the function OTExtensionWithMatrix::extend in /OT/OTExtensionWithMatrix.cpp. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message.
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).