diff --git a/scripts/validation/opcua-lifecycle-memory/late-slope/container.sh b/scripts/validation/opcua-lifecycle-memory/late-slope/container.sh
index 8cb84478..d8520aae 100644
--- a/scripts/validation/opcua-lifecycle-memory/late-slope/container.sh
+++ b/scripts/validation/opcua-lifecycle-memory/late-slope/container.sh
@@ -1,5 +1,18 @@
 #!/usr/bin/env bash
 # Execute the immutable self-contained apphost through the cached Linux VSTest controller.
+verify_mapped_coreclr() {
+    awk -v identity="$2" '
+        $6 ~ /\/libcoreclr.so$/ {
+            if (NF != 6 || ($5 " " $6) != identity) bad = 1
+            else matched = 1
+        }
+        END { exit (matched && !bad) ? 0 : 1 }
+    ' "$1"
+}
+
+# The offline controls source only the mapping check above.
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then return 0; fi
+
 set -euo pipefail
 umask 077
 app=ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests
@@ -51,8 +64,8 @@ while ((SECONDS < proof_deadline)) && kill -0 "$vstest_pid" 2>/dev/null; do
         [[ $pid =~ ^[1-9][0-9]*$ ]]
         executable=$(readlink "/proc/$pid/exe")
         [[ $executable == "/app/$app" ]]
-        runtime=$(awk '$6 ~ /\/libcoreclr.so$/ {print $6}' "/proc/$pid/maps" | sort -u)
-        [[ $runtime == /app/libcoreclr.so ]]
+        runtime=/app/libcoreclr.so
+        verify_mapped_coreclr "/proc/$pid/maps" "$(stat -c '%i %n' "$runtime")"
         runtime_hash=$(sha256sum "$runtime")
         printf 'targetPid=%s\nactualExecutable=%s\nmappedCoreClr=%s\ncoreClrSha256=%s\n' \
             "$pid" "$executable" "$runtime" "${runtime_hash%% *}" > /task/target-runtime.txt
diff --git a/scripts/validation/opcua-lifecycle-memory/late-slope/test_offline.py b/scripts/validation/opcua-lifecycle-memory/late-slope/test_offline.py
index f8d270e3..505d58ec 100644
--- a/scripts/validation/opcua-lifecycle-memory/late-slope/test_offline.py
+++ b/scripts/validation/opcua-lifecycle-memory/late-slope/test_offline.py
@@ -4,6 +4,7 @@
 import json
 import os
 from pathlib import Path
+import subprocess
 import sys
 import tempfile
 import unittest
@@ -299,6 +300,20 @@ class ReceiptControls(unittest.TestCase):
 
 
 class BundleControls(unittest.TestCase):
+    def test_mapped_runtime_requires_the_mounted_inode_and_live_file(self):
+        script = Path(__file__).with_name("container.sh")
+        with tempfile.TemporaryDirectory() as temporary:
+            maps = Path(temporary) / "maps"
+            live = "1000-2000 r-xp 00000000 00:01 42 /app/libcoreclr.so"
+            for line, expected in ((live, 0), (live + " (deleted)", 1), (live.replace(" 42 ", " 43 "), 1),
+                                   (live + "\n" + live.replace("/app/", "/different/"), 1)):
+                with self.subTest(line=line):
+                    maps.write_text(line + "\n", encoding="ascii")
+                    result = subprocess.run(["bash", "-c", 'source "$1"\nverify_mapped_coreclr "$2" "$3"',
+                                             "map-control", str(script), str(maps), "42 /app/libcoreclr.so"],
+                                            capture_output=True, text=True, timeout=5)
+                    self.assertEqual(result.returncode, expected, result.stderr)
+
     def test_remote_override_fails_before_asking_docker(self):
         with patch.dict(os.environ, {"DOCKER_HOST": "tcp://example.invalid:2375"}), patch("bundle.subprocess.check_output") as docker:
             with self.assertRaisesRegex(ValueError, "override"):