diff --git a/packages/react-reconciler/src/ReactFiberConcurrentUpdates.new.js b/packages/react-reconciler/src/ReactFiberConcurrentUpdates.new.js
index ee35a11640e2f..74e19f40b4982 100644
--- a/packages/react-reconciler/src/ReactFiberConcurrentUpdates.new.js
+++ b/packages/react-reconciler/src/ReactFiberConcurrentUpdates.new.js
@@ -19,7 +19,10 @@ import type {
 import type {Lane, Lanes} from './ReactFiberLane.new';
 import type {OffscreenInstance} from './ReactFiberOffscreenComponent';
 
-import {warnAboutUpdateOnNotYetMountedFiberInDEV} from './ReactFiberWorkLoop.new';
+import {
+  warnAboutUpdateOnNotYetMountedFiberInDEV,
+  throwIfInfiniteUpdateLoopDetected,
+} from './ReactFiberWorkLoop.new';
 import {
   NoLane,
   NoLanes,
@@ -207,6 +210,13 @@ function markUpdateLaneFromFiberToRoot(
 }
 
 function getRootForUpdatedFiber(sourceFiber: Fiber): FiberRoot | null {
+  // TODO: We will detect and infinite update loop and throw even if this fiber
+  // has already unmounted. This isn't really necessary but it happens to be the
+  // current behavior we've used for several release cycles. Consider not
+  // performing this check if the updated fiber already unmounted, since it's
+  // not possible for that to cause an infinite update loop.
+  throwIfInfiniteUpdateLoopDetected();
+
   // When a setState happens, we must ensure the root is scheduled. Because
   // update queues do not have a backpointer to the root, the only way to do
   // this currently is to walk up the return path. This used to not be a big
diff --git a/packages/react-reconciler/src/ReactFiberConcurrentUpdates.old.js b/packages/react-reconciler/src/ReactFiberConcurrentUpdates.old.js
index 8f3a11c938f65..42b6520238c15 100644
--- a/packages/react-reconciler/src/ReactFiberConcurrentUpdates.old.js
+++ b/packages/react-reconciler/src/ReactFiberConcurrentUpdates.old.js
@@ -18,7 +18,10 @@ import type {
 } from './ReactFiberClassUpdateQueue.old';
 import type {Lane} from './ReactFiberLane.old';
 
-import {warnAboutUpdateOnNotYetMountedFiberInDEV} from './ReactFiberWorkLoop.old';
+import {
+  warnAboutUpdateOnNotYetMountedFiberInDEV,
+  throwIfInfiniteUpdateLoopDetected,
+} from './ReactFiberWorkLoop.old';
 import {mergeLanes} from './ReactFiberLane.old';
 import {NoFlags, Placement, Hydrating} from './ReactFiberFlags';
 import {HostRoot} from './ReactWorkTags';
@@ -143,6 +146,13 @@ function markUpdateLaneFromFiberToRoot(
   sourceFiber: Fiber,
   lane: Lane,
 ): FiberRoot | null {
+  // TODO: We will detect and infinite update loop and throw even if this fiber
+  // has already unmounted. This isn't really necessary but it happens to be the
+  // current behavior we've used for several release cycles. Consider not
+  // performing this check if the updated fiber already unmounted, since it's
+  // not possible for that to cause an infinite update loop.
+  throwIfInfiniteUpdateLoopDetected();
+
   // Update the source fiber's lanes
   sourceFiber.lanes = mergeLanes(sourceFiber.lanes, lane);
   let alternate = sourceFiber.alternate;
diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.new.js b/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
index e7e95b2694e07..21f9d17850f1c 100644
--- a/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
+++ b/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
@@ -536,8 +536,6 @@ export function scheduleUpdateOnFiber(
   lane: Lane,
   eventTime: number,
 ) {
-  checkForNestedUpdates();
-
   if (__DEV__) {
     if (isRunningInsertionEffect) {
       console.error('useInsertionEffect must not schedule updates.');
@@ -2782,10 +2780,12 @@ function jnd(timeElapsed: number) {
     : ceil(timeElapsed / 1960) * 1960;
 }
 
-function checkForNestedUpdates() {
+export function throwIfInfiniteUpdateLoopDetected() {
   if (nestedUpdateCount > NESTED_UPDATE_LIMIT) {
     nestedUpdateCount = 0;
+    nestedPassiveUpdateCount = 0;
     rootWithNestedUpdates = null;
+    rootWithPassiveNestedUpdates = null;
 
     throw new Error(
       'Maximum update depth exceeded. This can happen when a component ' +
diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.old.js b/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
index dc517877393c9..4f0af4387098e 100644
--- a/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
+++ b/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
@@ -531,8 +531,6 @@ export function scheduleUpdateOnFiber(
   lane: Lane,
   eventTime: number,
 ) {
-  checkForNestedUpdates();
-
   if (__DEV__) {
     if (isRunningInsertionEffect) {
       console.error('useInsertionEffect must not schedule updates.');
@@ -2771,7 +2769,7 @@ function jnd(timeElapsed: number) {
     : ceil(timeElapsed / 1960) * 1960;
 }
 
-function checkForNestedUpdates() {
+export function throwIfInfiniteUpdateLoopDetected() {
   if (nestedUpdateCount > NESTED_UPDATE_LIMIT) {
     nestedUpdateCount = 0;
     rootWithNestedUpdates = null;
diff --git a/scripts/merge-fork/forked-revisions b/scripts/merge-fork/forked-revisions
index 517ed44977fe4..c4bdf3a85b0e2 100644
--- a/scripts/merge-fork/forked-revisions
+++ b/scripts/merge-fork/forked-revisions
@@ -1,2 +1,3 @@
+58bb11764bf0bb6db47527a64f693f67cdd3b0bb [FORKED] Check for infinite update loops even if unmounted
 31882b5dd66f34f70d341ea2781cacbe802bf4d5 [FORKED] Bugfix: Revealing a hidden update
 17691acc071d56261d43c3cf183f287d983baa9b [FORKED] Don't update childLanes until after current render