diff --git a/pkg/device/enflame/device.go b/pkg/device/enflame/device.go
index 6d59773fde..f5343a1a85 100644
--- a/pkg/device/enflame/device.go
+++ b/pkg/device/enflame/device.go
@@ -391,20 +391,20 @@ func (enf *EnflameDevices) Fit(devices []*device.DeviceUsage, request device.Con
 		reason[common.ModeNotFit]++
 		return false, tmpDevs, common.GenReason(reason, len(devices))
 	}
-	requiredSlice := int32(profile.Size)
-	if requiredSlice <= 0 {
+	if profile.Size <= 0 || profile.Size > math.MaxInt32 {
 		reason[common.ModeNotFit]++
 		return false, tmpDevs, common.GenReason(reason, len(devices))
 	}
-	profileMemoryMiB := int32(profile.MemoryGB * 1024)
-	if profileMemoryMiB <= 0 {
+	if profile.MemoryGB <= 0 || profile.MemoryGB > math.MaxInt32/1024 {
 		reason[common.ModeNotFit]++
 		return false, tmpDevs, common.GenReason(reason, len(devices))
 	}
-	profileCorePercent := int32(profile.CorePercent)
-	if profileCorePercent <= 0 {
-		profileCorePercent = 1
+	if profile.CorePercent > math.MaxInt32 {
+		reason[common.ModeNotFit]++
+		return false, tmpDevs, common.GenReason(reason, len(devices))
 	}
+	profileMemoryMiB := int32(profile.MemoryGB * 1024)
+	profileCorePercent := int32(profile.CorePercent)
 	for i, v := range slices.Backward(devices) {
 		dev := v
 		klog.V(4).InfoS("scoring pod", "pod", klog.KObj(pod), "device", dev.ID, "Memreq", k.Memreq, "MemPercentagereq", k.MemPercentagereq, "Coresreq", k.Coresreq, "Nums", k.Nums, "device index", i)
@@ -660,7 +660,6 @@ func parseDRSCapacity(raw any) (int32, error) {
 	}
 }
 
-// clampToInt32 bounds v to the int32 range instead of letting the cast wrap silently.
 func clampToInt32(v int) int32 {
 	if v > math.MaxInt32 {
 		return math.MaxInt32
diff --git a/pkg/device/enflame/device_test.go b/pkg/device/enflame/device_test.go
index fb8f0a3984..cfa3e2e7cd 100644
--- a/pkg/device/enflame/device_test.go
+++ b/pkg/device/enflame/device_test.go
@@ -377,7 +377,6 @@ func TestAddResourceUsage_ClampsOnOverflow(t *testing.T) {
 	assert.NilError(t, err)
 	assert.Equal(t, n.Used, int32(math.MaxInt32))
 
-	// A second oversized slice must saturate, not wrap negative.
 	err = dev.AddResourceUsage(&corev1.Pod{}, n, ctr)
 	assert.NilError(t, err)
 	assert.Equal(t, n.Used, int32(math.MaxInt32))
@@ -421,3 +420,42 @@ func TestAddResourceUsage_ClampsOversizedSliceString(t *testing.T) {
 	assert.NilError(t, err)
 	assert.Equal(t, n.Used, int32(math.MaxInt32))
 }
+
+func TestFit_OversizedProfileRejected(t *testing.T) {
+	dev := InitEnflameDevice(EnflameConfig{ResourceNameDRSGCU: "enflame.com/drs-gcu"})
+	devices := []*device.DeviceUsage{
+		{
+			ID:       "node-a-enflame-drs-0",
+			Index:    0,
+			Count:    6,
+			Used:     0,
+			Totalmem: 40960,
+			Type:     EnflameVGCUDevice,
+			CustomInfo: map[string]any{
+				"minor":    "0",
+				"index":    "0",
+				"profiles": map[string]string{"4294967299g.4294967299gb": "0"},
+			},
+		},
+	}
+	req := device.ContainerDeviceRequest{Nums: 1, Type: EnflameVGCUDevice, Memreq: 3, MemPercentagereq: 101}
+	fit, result, _ := dev.Fit(devices, req, &corev1.Pod{ObjectMeta: metav1.ObjectMeta{Annotations: map[string]string{}}}, &device.NodeInfo{}, &device.PodDevices{})
+	assert.Equal(t, fit, false)
+	assert.Equal(t, len(result[EnflameVGCUDevice]), 0)
+
+	devices[0].CustomInfo["profiles"] = map[string]string{"4294967299g.20gb": "0"}
+	fit, result, _ = dev.Fit(devices, req, &corev1.Pod{ObjectMeta: metav1.ObjectMeta{Annotations: map[string]string{}}}, &device.NodeInfo{}, &device.PodDevices{})
+	assert.Equal(t, fit, false)
+	assert.Equal(t, len(result[EnflameVGCUDevice]), 0)
+
+	devices[0].CustomInfo["profiles"] = map[string]string{"2g.4294967299gb": "0"}
+	fit, result, _ = dev.Fit(devices, req, &corev1.Pod{ObjectMeta: metav1.ObjectMeta{Annotations: map[string]string{}}}, &device.NodeInfo{}, &device.PodDevices{})
+	assert.Equal(t, fit, false)
+	assert.Equal(t, len(result[EnflameVGCUDevice]), 0)
+
+	devices[0].CustomInfo["maxSlice"] = "1"
+	devices[0].CustomInfo["profiles"] = map[string]string{"2147483647g.20gb": "0"}
+	fit, result, _ = dev.Fit(devices, req, &corev1.Pod{ObjectMeta: metav1.ObjectMeta{Annotations: map[string]string{}}}, &device.NodeInfo{}, &device.PodDevices{})
+	assert.Equal(t, fit, false)
+	assert.Equal(t, len(result[EnflameVGCUDevice]), 0)
+}