diff -up libssh2-1.8.0/src/transport.c.diff libssh2-1.8.0/src/transport.c

--- libssh2-1.8.0/src/transport.c.diff	2023-09-20 12:21:55.121219631 -0400

+++ libssh2-1.8.0/src/transport.c	2023-09-20 12:24:26.694051411 -0400

@@ -460,7 +460,7 @@ int _libssh2_transport_read(LIBSSH2_SESS

              * or less (including length, padding length, payload,

              * padding, and MAC.)."

              */

-            if (total_num > LIBSSH2_PACKET_MAXPAYLOAD) {

+            if (total_num > LIBSSH2_PACKET_MAXPAYLOAD || total_num == 0) {

                 return LIBSSH2_ERROR_OUT_OF_BOUNDARY;

             }