diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d7328ca8f50..cfad9ecfd0ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,23 @@
 # Changelog
 
+## 0.35.0
+
+### Bug Fixes
+
+#### SDK
+
+* Fix for the `x/staking` module security advisory for downstream consumers of the
+SDK. This fix was introduced in v0.34.6 for the Cosmos Hub.
+
+## 0.34.7
+
+### Bug Fixes
+
+#### SDK
+
+* Fix gas consumption bug in `Undelegate` preventing the ability to sync from
+genesis.
+
 ## 0.34.6
 
 ### Bug Fixes
diff --git a/x/staking/handler_test.go b/x/staking/handler_test.go
index 61b69d3ee5f2..14759e5828de 100644
--- a/x/staking/handler_test.go
+++ b/x/staking/handler_test.go
@@ -804,67 +804,6 @@ func TestUnbondingFromUnbondingValidator(t *testing.T) {
 	require.False(t, found, "unbonding object should not exist")
 }
 
-func TestUnbondingFork(t *testing.T) {
-	ctx, _, keeper := keep.CreateTestInput(t, false, 1000)
-	validatorAddr, delegatorAddr := sdk.ValAddress(keep.Addrs[0]), keep.Addrs[1]
-
-	// create the validator
-	msgCreateValidator := NewTestMsgCreateValidator(validatorAddr, keep.PKs[0], sdk.NewInt(10))
-	got := handleMsgCreateValidator(ctx, msgCreateValidator, keeper)
-	require.True(t, got.IsOK(), "expected no error on runMsgCreateValidator")
-
-	// bond a delegator
-	msgDelegate := NewTestMsgDelegate(delegatorAddr, validatorAddr, sdk.NewInt(10))
-	got = handleMsgDelegate(ctx, msgDelegate, keeper)
-	require.True(t, got.IsOK(), "expected ok, got %v", got)
-
-	// unbond the delegator from the validator
-	unbondAmt := sdk.NewCoin(sdk.DefaultBondDenom, sdk.NewInt(10))
-	msgUndelegateDelegator := NewMsgUndelegate(delegatorAddr, validatorAddr, unbondAmt)
-	got = handleMsgUndelegate(ctx, msgUndelegateDelegator, keeper)
-	require.True(t, got.IsOK(), "expected no error")
-
-	EndBlocker(ctx, keeper)
-
-	// validate the unbonding object does not exist as it was never created
-	_, found := keeper.GetUnbondingDelegation(ctx, delegatorAddr, validatorAddr)
-	require.False(t, found, "unbonding object should not exist")
-
-	// reproduce same sequence except past fork height
-	ctx, _, keeper = keep.CreateTestInput(t, false, 1000)
-	validatorAddr, delegatorAddr = sdk.ValAddress(keep.Addrs[0]), keep.Addrs[1]
-	ctx = ctx.WithBlockHeight(keep.UndelegatePatchHeight)
-
-	// create the validator
-	msgCreateValidator = NewTestMsgCreateValidator(validatorAddr, keep.PKs[0], sdk.NewInt(10))
-	got = handleMsgCreateValidator(ctx, msgCreateValidator, keeper)
-	require.True(t, got.IsOK(), "expected no error on runMsgCreateValidator")
-
-	// bond a delegator
-	msgDelegate = NewTestMsgDelegate(delegatorAddr, validatorAddr, sdk.NewInt(10))
-	got = handleMsgDelegate(ctx, msgDelegate, keeper)
-	require.True(t, got.IsOK(), "expected ok, got %v", got)
-
-	// unbond the delegator from the validator
-	msgUndelegateDelegator = NewMsgUndelegate(delegatorAddr, validatorAddr, unbondAmt)
-	got = handleMsgUndelegate(ctx, msgUndelegateDelegator, keeper)
-	require.True(t, got.IsOK(), "expected no error")
-
-	EndBlocker(ctx, keeper)
-
-	// validate the unbonding object exists prior to the unbonding period expiring
-	_, found = keeper.GetUnbondingDelegation(ctx, delegatorAddr, validatorAddr)
-	require.True(t, found, "unbonding object should exist")
-
-	// move to past unbonding period
-	ctx = ctx.WithBlockTime(ctx.BlockHeader().Time.Add(keeper.UnbondingTime(ctx)))
-	EndBlocker(ctx, keeper)
-
-	// validate the unbonding object no longer exists as the unbonding period has expired
-	_, found = keeper.GetUnbondingDelegation(ctx, delegatorAddr, validatorAddr)
-	require.False(t, found, "unbonding object should not exist")
-}
-
 func TestRedelegationPeriod(t *testing.T) {
 	ctx, AccMapper, keeper := keep.CreateTestInput(t, false, 1000)
 	validatorAddr, validatorAddr2 := sdk.ValAddress(keep.Addrs[0]), sdk.ValAddress(keep.Addrs[1])
diff --git a/x/staking/keeper/delegation.go b/x/staking/keeper/delegation.go
index 9559398923db..5ef10f6f45b8 100644
--- a/x/staking/keeper/delegation.go
+++ b/x/staking/keeper/delegation.go
@@ -9,10 +9,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/x/staking/types"
 )
 
-// UndelegatePatchHeight reflects the height at which to switch to the
-// undelegating patch.
-const UndelegatePatchHeight = 482100
-
 // return a specific delegation
 func (k Keeper) GetDelegation(ctx sdk.Context,
 	delAddr sdk.AccAddress, valAddr sdk.ValAddress) (
@@ -586,41 +582,6 @@ func (k Keeper) Undelegate(
 	ctx sdk.Context, delAddr sdk.AccAddress, valAddr sdk.ValAddress, sharesAmount sdk.Dec,
 ) (time.Time, sdk.Error) {
 
-	// Undelegating must obey the unbonding period regardless of the validator's
-	// status for safety. Block heights prior to undelegatePatchHeight allowed
-	// delegates to unbond from an unbonded validator immediately.
-	if ctx.BlockHeight() < UndelegatePatchHeight {
-		completionTime, height, completeNow := k.getBeginInfo(ctx, valAddr)
-
-		returnAmount, err := k.unbond(ctx, delAddr, valAddr, sharesAmount)
-		if err != nil {
-			return completionTime, err
-		}
-
-		// no need to create the ubd object just complete now
-		if completeNow {
-			balance := sdk.NewCoin(k.BondDenom(ctx), returnAmount)
-
-			// track undelegation only when remaining or truncated shares are non-zero
-			if !balance.IsZero() {
-				if _, err := k.bankKeeper.UndelegateCoins(ctx, delAddr, sdk.Coins{balance}); err != nil {
-					return completionTime, err
-				}
-			}
-
-			return completionTime, nil
-		}
-
-		if k.HasMaxUnbondingDelegationEntries(ctx, delAddr, valAddr) {
-			return time.Time{}, types.ErrMaxUnbondingDelegationEntries(k.Codespace())
-		}
-
-		ubd := k.SetUnbondingDelegationEntry(ctx, delAddr, valAddr, height, completionTime, returnAmount)
-		k.InsertUBDQueue(ctx, ubd, completionTime)
-
-		return completionTime, nil
-	}
-
 	returnAmount, err := k.unbond(ctx, delAddr, valAddr, sharesAmount)
 	if err != nil {
 		return time.Time{}, err