1 files changed, 3 insertions, 2 deletions
diff --git a/netwerk/base/nsIOService.cpp b/netwerk/base/nsIOService.cpp
index a953dc78c1..55f40a41ef 100644
--- a/netwerk/base/nsIOService.cpp
+++ b/netwerk/base/nsIOService.cpp
@@ -1203,13 +1203,14 @@ nsIOService::SetConnectivityInternal(bool aConnectivity)
 NS_IMETHODIMP
 nsIOService::AllowPort(int32_t inPort, const char *scheme, bool *_retval)
 {
-    int16_t port = inPort;
+    int32_t port = inPort;
     if (port == -1) {
         *_retval = true;
         return NS_OK;
     }
 
-    if (port == 0) {
+    // Ensure the port number is within a valid range
+    if (port <= 0 || port >= std::numeric_limits<uint16_t>::max()) {
         *_retval = false;
         return NS_OK;
     }