diff --git a/core/error.go b/core/error.go
index 51ebefc137..234620ee4b 100644
--- a/core/error.go
+++ b/core/error.go
@@ -63,6 +63,10 @@ var (
 	// have enough funds for transfer(topmost call only).
 	ErrInsufficientFundsForTransfer = errors.New("insufficient funds for transfer")
 
+	// ErrMaxInitCodeSizeExceeded is returned if creation transaction provides the init code bigger
+	// than init code size limit.
+	ErrMaxInitCodeSizeExceeded = errors.New("max initcode size exceeded")
+
 	// ErrInsufficientFunds is returned if the total cost of executing a transaction
 	// is higher than the balance of the user's account.
 	ErrInsufficientFunds = errors.New("insufficient funds for gas * price + value")
diff --git a/core/tx_pool.go b/core/tx_pool.go
index 7648668688..3d3f01eecb 100644
--- a/core/tx_pool.go
+++ b/core/tx_pool.go
@@ -18,6 +18,7 @@ package core
 
 import (
 	"errors"
+	"fmt"
 	"math"
 	"math/big"
 	"sort"
@@ -604,6 +605,11 @@ func (pool *TxPool) validateTx(tx *types.Transaction, local bool) error {
 	if uint64(tx.Size()) > txMaxSize {
 		return ErrOversizedData
 	}
+	// Check whether the init code size has been exceeded.
+	// (TODO): Add a hardfork check here while pulling upstream changes.
+	if tx.To() == nil && len(tx.Data()) > params.MaxInitCodeSize {
+		return fmt.Errorf("%w: code size %v limit %v", ErrMaxInitCodeSizeExceeded, len(tx.Data()), params.MaxInitCodeSize)
+	}
 	// Transactions can't be negative. This may never happen using RLP decoded
 	// transactions but may occur if you create a transaction using the RPC.
 	if tx.Value().Sign() < 0 {
diff --git a/params/protocol_params.go b/params/protocol_params.go
index d468af5d3c..103266caff 100644
--- a/params/protocol_params.go
+++ b/params/protocol_params.go
@@ -125,7 +125,8 @@ const (
 	ElasticityMultiplier = 2          // Bounds the maximum gas limit an EIP-1559 block may have.
 	InitialBaseFee       = 1000000000 // Initial base fee for EIP-1559 blocks.
 
-	MaxCodeSize = 24576 // Maximum bytecode to permit for a contract
+	MaxCodeSize     = 24576           // Maximum bytecode to permit for a contract
+	MaxInitCodeSize = 2 * MaxCodeSize // Maximum initcode to permit in a creation transaction and create instructions
 
 	// Precompiled contract gas prices