diff --git a/src/quic_conn.c b/src/quic_conn.c
index ea9a55b97..f13f474d0 100644
--- a/src/quic_conn.c
+++ b/src/quic_conn.c
@@ -1548,9 +1548,16 @@ int quic_conn_release(struct quic_conn *qc)
 	BUG_ON(qc->conn);
 
 	cc_qc = NULL;
+	/* Convert to quic_conn_closed if entering in CLOSING state, except in
+	 * the following case :
+	 * - idle timeout already expired
+	 * - no FD available for a backend connection (after connect() failure)
+	 */
 	if ((qc->flags & QUIC_FL_CONN_CLOSING) && !(qc->flags & QUIC_FL_CONN_EXP_TIMER) &&
-	    qc->tx.cc_buf_area)
+	    qc->tx.cc_buf_area &&
+	    (!qc_is_back(qc) || qc_test_fd(qc))) {
 		cc_qc = qc_new_cc_conn(qc);
+	}
 
 	if (!cc_qc) {
 		task_destroy(qc->idle_timer_task);
diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index c21b1b551..e6ca5a361 100644
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -14,6 +14,7 @@
 #include <haproxy/buf.h>
 #include <haproxy/connection.h>
 #include <haproxy/quic_conn.h>
+#include <haproxy/quic_sock.h>
 #include <haproxy/quic_ssl.h>
 #include <haproxy/ssl_sock.h>
 #include <haproxy/quic_trace.h>
@@ -42,10 +43,13 @@ static void quic_close(struct connection *conn, void *xprt_ctx)
 	qc->flags |= QUIC_FL_CONN_XPRT_CLOSED;
 	qc->conn = NULL;
 
-	/* If the quic-conn timer has already expired or if already in "connection close"
-	 * state, free the quic-conn.
+	/* Immediately release the connection in the following cases :
+	 * - idle timeout already expired
+	 * - connection in closing state
+	 * - backend conn with no FD avail (after connect() failure)
 	 */
-	if (qc->flags & (QUIC_FL_CONN_EXP_TIMER|QUIC_FL_CONN_CLOSING)) {
+	if (qc->flags & (QUIC_FL_CONN_EXP_TIMER|QUIC_FL_CONN_CLOSING) ||
+	    (qc_is_back(qc) && !qc_test_fd(qc))) {
 		quic_conn_release(qc);
 		qc = NULL;
 		goto leave;