path: fix normalization of Windows device paths missing colon

Author: HassanFleyah

lib/path.js

@@ -397,18 +397,29 @@ const win32 = {
               j++;
             }
             if (j === len || j !== last) {
-              if (firstPart === '.' || firstPart === '?') {
-                // We matched a device root (e.g. \\\\.\\PHYSICALDRIVE0)
-                device = `\\\\${firstPart}`;
-                rootEnd = 4;
-                const colonIndex = StringPrototypeIndexOf(path, ':');
-                // Special case: handle \\?\COM1: or similar reserved device paths
+             if (firstPart === '.' || firstPart === '?') {
+              // We matched a device root (e.g. \\\\.\\PHYSICALDRIVE0)
+              device = `\\\\${firstPart}`;
+              rootEnd = 4;
+              const colonIndex = StringPrototypeIndexOf(path, ':');
+
+              if (colonIndex !== -1) {
+                // Handle \\?\COM1: or similar reserved device paths with colon
                 const possibleDevice = StringPrototypeSlice(path, 4, colonIndex + 1);
                 if (isWindowsReservedName(possibleDevice, possibleDevice.length - 1)) {
                   device = `\\\\?\\${possibleDevice}`;
                   rootEnd = 4 + possibleDevice.length;
                 }
-              } else if (j === len) {
+              } else {
+                // Handle \\.\CON or \\?\CON where the colon is missing
+                const possibleDevice = StringPrototypeSlice(path, 4);
+                const upper = StringPrototypeToUpperCase(possibleDevice);
+                if (ArrayPrototypeIncludes(WINDOWS_RESERVED_NAMES, upper)) {
+                  device = `\\\\.\\${possibleDevice}`;
+                  rootEnd = 4 + possibleDevice.length;
+                }
+              }
+            } else if (j === len) {
                 // We matched a UNC root only
                 // Return the normalized version of the UNC root since there
                 // is nothing left to process