diff --git a/udev/udev-exec.c b/udev/udev-exec.c
index ae385bf..6ad4fc1 100644
--- a/udev/udev-exec.c
+++ b/udev/udev-exec.c
@@ -153,7 +153,9 @@ static int exec_msg(struct udev *udev, int sock, struct child **childp)
 	if (child == NULL)
 		return 0;
 
-	pid = fork();
+	/* CAUTION.  Child may (or may not) share memory - including stack.
+	   Child should do the minimum necessary before exec() */
+	pid = vfork();
 	switch(pid) {
 	case 0:
 		close(sock);