From ba2213011607628535cd9a8f8c455000041f5dab Mon Sep 17 00:00:00 2001
From: Guido Casati <hello@guidocasati.com>
Date: Wed, 19 Mar 2025 13:23:16 +0100
Subject: [PATCH] Disable EPS NAS security algorithms in 5GMM UE capabilities

* this is only relevant if N26 interface is supported by the AMF
  and the UE is supporting S1

closes #915
---
 openair3/NAS/NR_UE/nr_nas_msg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/openair3/NAS/NR_UE/nr_nas_msg.c b/openair3/NAS/NR_UE/nr_nas_msg.c
index 64a541aa78..95548da714 100644
--- a/openair3/NAS/NR_UE/nr_nas_msg.c
+++ b/openair3/NAS/NR_UE/nr_nas_msg.c
@@ -520,7 +520,7 @@ static FGMMCapability set_fgmm_capability(nr_ue_nas_t *nas)
   cap.restrict_ec = 0;
   cap.lpp = 1;
   cap.ho_attach = 1;
-  cap.s1_mode = 1;
+  cap.s1_mode = 0;
 
   if (cap.length == 1)
     return cap; // Send minimum length only, 1 octet