diff --git a/full_updater/backend/scanner.py b/full_updater/backend/scanner.py
index a721c21..27aee27 100644
--- a/full_updater/backend/scanner.py
+++ b/full_updater/backend/scanner.py
@@ -140,36 +140,45 @@ def scan_os(target: Target) -> str:
     """Récupère le nom, la version complète et le codename de l'OS."""
     prefix = [] if target.is_host else ["pct", "exec", target.target_id, "--"]
 
-    # 1. Récupérer le nom (Debian, Ubuntu...)
-    ok, name_out, _ = run_cmd(prefix + ["lsb_release", "-is"], timeout=30)
-    os_name = name_out.strip() if ok else ""
+    # 1. Lire /etc/os-release pour VERSION_ID (ex: 12.9) et PRETTY_NAME
+    ok, osrel_out, _ = run_cmd(prefix + ["cat", "/etc/os-release"], timeout=30)
+    version_id = ""
+    pretty_name = ""
+    if ok:
+        ver_match = re.search(r'VERSION_ID="([^"]+)"', osrel_out)
+        if ver_match:
+            version_id = ver_match.group(1)
+        pretty_match = re.search(r'PRETTY_NAME="([^"]+)"', osrel_out)
+        if pretty_match:
+            pretty_name = pretty_match.group(1)
 
-    # 2. Récupérer le codename (bookworm, trixie...)
+    # 2. Récupérer le codename via lsb_release
     ok, code_out, _ = run_cmd(prefix + ["lsb_release", "-cs"], timeout=30)
     codename = code_out.strip() if ok else ""
 
-    # 3. Récupérer la version complète depuis /etc/debian_version (ex: 12.9)
-    ok, ver_out, _ = run_cmd(prefix + ["cat", "/etc/debian_version"], timeout=30)
-    version = ver_out.strip() if ok else ""
+    # 3. Fallback sur /etc/debian_version si VERSION_ID vide
+    if not version_id:
+        ok, ver_out, _ = run_cmd(prefix + ["cat", "/etc/debian_version"], timeout=30)
+        version_id = ver_out.strip() if ok else ""
 
-    # 4. Fallback sur lsb_release -rs si /etc/debian_version vide
-    if not version:
+    # 4. Fallback sur lsb_release -rs
+    if not version_id:
         ok, ver_out, _ = run_cmd(prefix + ["lsb_release", "-rs"], timeout=30)
-        version = ver_out.strip() if ok else ""
+        version_id = ver_out.strip() if ok else ""
 
-    # 5. Fallback sur /etc/os-release si tout le reste échoue
-    if not os_name or not version:
-        ok, osrel_out, _ = run_cmd(prefix + ["cat", "/etc/os-release"], timeout=30)
-        if ok:
-            pretty = re.search(r'PRETTY_NAME="([^"]+)"', osrel_out)
-            if pretty:
-                return pretty.group(1)
-        return "OS inconnu"
+    # 5. Récupérer le nom via lsb_release
+    ok, name_out, _ = run_cmd(prefix + ["lsb_release", "-is"], timeout=30)
+    os_name = name_out.strip() if ok else ""
+
+    if not os_name and pretty_name:
+        return pretty_name
+    if not os_name or not version_id:
+        return pretty_name if pretty_name else "OS inconnu"
 
     # Construire le libellé final
     if codename:
-        return f"{os_name} GNU/Linux {version} ({codename})"
-    return f"{os_name} GNU/Linux {version}"
+        return f"{os_name} GNU/Linux {version_id} ({codename})"
+    return f"{os_name} GNU/Linux {version_id}"
 
 
 def ensure_debsecan_installed(is_host: bool, vmid: str = "") -> tuple[bool, str]: