diff -up vim80/src/ex_getln.c.cve0359 vim80/src/ex_getln.c
--- vim80/src/ex_getln.c.cve0359	2022-01-27 16:55:41.386213891 +0100
+++ vim80/src/ex_getln.c	2022-01-27 17:00:20.330960544 +0100
@@ -300,7 +300,7 @@ getcmdline(
     ccline.cmdindent = (firstc > 0 ? indent : 0);
 
     /* alloc initial ccline.cmdbuff */
-    alloc_cmdbuff(exmode_active ? 250 : indent + 1);
+    alloc_cmdbuff(indent + 50);
     if (ccline.cmdbuff == NULL)
 	return NULL;			    /* out of memory */
     ccline.cmdlen = ccline.cmdpos = 0;