Dell PowerEdge R640 R740 R740XD R840 R940 R940xa MX740c MX840c and Dell Precision 7920 Rack Workstation BIOS contain a stack-based buffer overflow vulnerability in systems with Intel Optane DC Persistent Memory installed. A local malicious user with high privileges may potentially exploit this vulnerability leading to a denial of Service arbitrary code execution or information disclosure in UEFI or BIOS Preboot Environment.