diff -ruN httpd-2.4.51.org/server/connection.c httpd-2.4.51/server/connection.c
--- httpd-2.4.51.org/server/connection.c	2021-09-26 08:11:22.000000000 -0600
+++ httpd-2.4.51/server/connection.c	2021-10-09 13:03:10.908773670 -0600
@@ -156,7 +156,9 @@
     apr_socket_t *csd = ap_get_conn_socket(c);
 
     if (ap_start_lingering_close(c)) {
-        apr_socket_close(csd);
+        if (csd) {
+          apr_socket_close(csd);
+        }
         return;
     }