diff -ru dnsdist-1.9.12.orig/dnsdist-discovery.cc dnsdist-1.9.12.CVE-2026-33599/dnsdist-discovery.cc
--- dnsdist-1.9.12.orig/dnsdist-discovery.cc	2026-03-13 16:09:16.000000000 +0100
+++ dnsdist-1.9.12.CVE-2026-33599/dnsdist-discovery.cc	2026-04-03 15:36:23.628168421 +0200
@@ -216,7 +216,7 @@
     }
 
     /* we prefer the address we already know, whenever possible */
-    if (tentativeAddresses.count(existingAddr) != 0) {
+    if (tentativeAddresses.empty() || tentativeAddresses.count(existingAddr) != 0) {
       tempConfig.d_addr = existingAddr;
     }
     else {