--- ./src/transport.c_ORIG	2026-08-03 01:39:10.648700410 -0500
+++ ./src/transport.c	2026-08-03 01:41:17.556949935 -0500
@@ -639,8 +639,12 @@
                 total_num = 4;
 
                 p->packet_length = _libssh2_ntohu32(block);
-                if(p->packet_length < 1)
+                if(p->packet_length < 1){
                     return LIBSSH2_ERROR_DECRYPT;
+				}
+                else if(p->packet_length > LIBSSH2_PACKET_MAXPAYLOAD) {
+                    return LIBSSH2_ERROR_OUT_OF_BOUNDARY;
+                }
 
                 /* total_num may include size field, however due to existing
                  * logic it needs to be removed after the entire packet is read