diff --git a/beacon-chain/core/helpers/rewards_penalties.go b/beacon-chain/core/helpers/rewards_penalties.go
index b567bfa70..28e06d3c8 100644
--- a/beacon-chain/core/helpers/rewards_penalties.go
+++ b/beacon-chain/core/helpers/rewards_penalties.go
@@ -2,6 +2,7 @@ package helpers
 
 import (
 	"errors"
+	"math"
 	"math/big"
 
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
@@ -10,6 +11,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	mathutil "github.com/prysmaticlabs/prysm/v5/math"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
+	"github.com/sirupsen/logrus"
 )
 
 var balanceCache = cache.NewEffectiveBalanceCache()
@@ -128,7 +130,12 @@ func IncreaseBalance(state state.BeaconState, idx primitives.ValidatorIndex, del
 //	  """
 //	  state.balances[index] += delta
 func IncreaseBalanceWithVal(currBalance, delta uint64) (uint64, error) {
-	return mathutil.Add64(currBalance, delta)
+	res, err := mathutil.Add64(currBalance, delta)
+	if err != nil {
+		logrus.Warn("validator balance overflow detected")
+		res = math.MaxUint64
+	}
+	return res, nil
 }
 
 // DecreaseBalance decreases validator with the given 'index' balance by 'delta' in Gwei.
diff --git a/beacon-chain/core/helpers/rewards_penalties_test.go b/beacon-chain/core/helpers/rewards_penalties_test.go
index bc1ce2bd3..32192297b 100644
--- a/beacon-chain/core/helpers/rewards_penalties_test.go
+++ b/beacon-chain/core/helpers/rewards_penalties_test.go
@@ -275,7 +275,7 @@ func buildState(slot primitives.Slot, validatorCount uint64) *ethpb.BeaconState
 	}
 }
 
-func TestIncreaseBadBalance_NotOK(t *testing.T) {
+func TestIncreaseBalance_OverflowCapped(t *testing.T) {
 	tests := []struct {
 		i  primitives.ValidatorIndex
 		b  []uint64
@@ -293,6 +293,9 @@ func TestIncreaseBadBalance_NotOK(t *testing.T) {
 			Balances: test.b,
 		})
 		require.NoError(t, err)
-		require.ErrorContains(t, "addition overflows", IncreaseBalance(state, test.i, test.nb))
+		require.NoError(t, IncreaseBalance(state, test.i, test.nb))
+		for _, bal := range state.Balances() {
+			require.Equal(t, bal, uint64(math.MaxUint64))
+		}
 	}
 }
diff --git a/beacon-chain/core/transition/altair_transition_no_verify_sig_test.go b/beacon-chain/core/transition/altair_transition_no_verify_sig_test.go
index b49a6c62f..5af6b9f26 100644
--- a/beacon-chain/core/transition/altair_transition_no_verify_sig_test.go
+++ b/beacon-chain/core/transition/altair_transition_no_verify_sig_test.go
@@ -226,8 +226,12 @@ func TestProcessEpoch_BadBalanceAltair(t *testing.T) {
 	epochParticipation[0] = participation
 	assert.NoError(t, s.SetCurrentParticipationBits(epochParticipation))
 	assert.NoError(t, s.SetPreviousParticipationBits(epochParticipation))
-	_, err = altair.ProcessEpoch(context.Background(), s)
-	assert.ErrorContains(t, "addition overflows", err)
+	s, err = altair.ProcessEpoch(context.Background(), s)
+	assert.NoError(t, err)
+	// verify overflow prevented
+	bal, err := s.BalanceAtIndex(0)
+	assert.NoError(t, err)
+	assert.Equal(t, uint64(math.MaxUint64), bal)
 }
 
 func createFullAltairBlockWithOperations(t *testing.T) (state.BeaconState,
diff --git a/beacon-chain/core/transition/bellatrix_transition_no_verify_sig_test.go b/beacon-chain/core/transition/bellatrix_transition_no_verify_sig_test.go
index 68cde2f90..ae4d9eec0 100644
--- a/beacon-chain/core/transition/bellatrix_transition_no_verify_sig_test.go
+++ b/beacon-chain/core/transition/bellatrix_transition_no_verify_sig_test.go
@@ -216,8 +216,12 @@ func TestProcessEpoch_BadBalanceBellatrix(t *testing.T) {
 	epochParticipation[0] = participation
 	assert.NoError(t, s.SetCurrentParticipationBits(epochParticipation))
 	assert.NoError(t, s.SetPreviousParticipationBits(epochParticipation))
-	_, err = altair.ProcessEpoch(context.Background(), s)
-	assert.ErrorContains(t, "addition overflows", err)
+	s, err = altair.ProcessEpoch(context.Background(), s)
+	assert.NoError(t, err)
+	// verify overflow prevented
+	bal, err := s.BalanceAtIndex(0)
+	assert.NoError(t, err)
+	assert.Equal(t, uint64(math.MaxUint64), bal)
 }
 
 func createFullBellatrixBlockWithOperations(t *testing.T) (state.BeaconState,