diff --git a/MdePkg/Include/Library/PeimEntryPoint.h b/MdePkg/Include/Library/PeimEntryPoint.h
index f09385978c..e3bb9dc388 100644
--- a/MdePkg/Include/Library/PeimEntryPoint.h
+++ b/MdePkg/Include/Library/PeimEntryPoint.h
@@ -27,6 +27,7 @@ extern CONST UINT32  _gPeimRevision;
   @retval  EFI_SUCCESS   The PEIM executed normally.
   @retval  !EFI_SUCCESS  The PEIM failed to execute normally.
 **/
+NO_STACK_COOKIE // MU_CHANGE: Project Mu Runtime Randomized Stack Cookie Support
 EFI_STATUS
 EFIAPI
 _ModuleEntryPoint (
diff --git a/MdePkg/Include/Library/StandaloneMmDriverEntryPoint.h b/MdePkg/Include/Library/StandaloneMmDriverEntryPoint.h
index a522c0a391..a305f4f768 100644
--- a/MdePkg/Include/Library/StandaloneMmDriverEntryPoint.h
+++ b/MdePkg/Include/Library/StandaloneMmDriverEntryPoint.h
@@ -45,6 +45,7 @@ extern CONST UINT8  _gDriverUnloadImageCount;
                                      ProcessModuleEntryPointList().
 
 **/
+NO_STACK_COOKIE // MU_CHANGE: Project Mu Runtime Randomized Stack Cookie Support
 EFI_STATUS
 EFIAPI
 _ModuleEntryPoint (
diff --git a/MdePkg/Include/Library/UefiApplicationEntryPoint.h b/MdePkg/Include/Library/UefiApplicationEntryPoint.h
index ce355947f7..02ae05502a 100644
--- a/MdePkg/Include/Library/UefiApplicationEntryPoint.h
+++ b/MdePkg/Include/Library/UefiApplicationEntryPoint.h
@@ -31,6 +31,7 @@ extern CONST UINT32  _gUefiDriverRevision;
   @retval  Other                     Return value from ProcessModuleEntryPointList().
 
 **/
+NO_STACK_COOKIE // MU_CHANGE: Project Mu Runtime Randomized Stack Cookie Support
 EFI_STATUS
 EFIAPI
 _ModuleEntryPoint (
diff --git a/MdePkg/Include/Library/UefiDriverEntryPoint.h b/MdePkg/Include/Library/UefiDriverEntryPoint.h
index 1dbcb46542..5fc2ed21ce 100644
--- a/MdePkg/Include/Library/UefiDriverEntryPoint.h
+++ b/MdePkg/Include/Library/UefiDriverEntryPoint.h
@@ -48,6 +48,7 @@ extern CONST UINT8  _gDriverUnloadImageCount;
   @retval  Other                     Return value from ProcessModuleEntryPointList().
 
 **/
+NO_STACK_COOKIE // MU_CHANGE: Project Mu Runtime Randomized Stack Cookie Support
 EFI_STATUS
 EFIAPI
 _ModuleEntryPoint (
diff --git a/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.c b/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.c
index 42aab62f5d..531b8833f8 100644
--- a/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.c
+++ b/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.c
@@ -24,6 +24,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
   @retval  EFI_SUCCESS   The PEIM executed normally.
   @retval  !EFI_SUCCESS  The PEIM failed to execute normally.
 **/
+NO_STACK_COOKIE // MU_CHANGE: Project Mu Runtime Randomized Stack Cookie Support
 EFI_STATUS
 EFIAPI
 _ModuleEntryPoint (
diff --git a/MdePkg/Library/StandaloneMmDriverEntryPoint/StandaloneMmDriverEntryPoint.c b/MdePkg/Library/StandaloneMmDriverEntryPoint/StandaloneMmDriverEntryPoint.c
index ff1c53b185..2417128fda 100644
--- a/MdePkg/Library/StandaloneMmDriverEntryPoint/StandaloneMmDriverEntryPoint.c
+++ b/MdePkg/Library/StandaloneMmDriverEntryPoint/StandaloneMmDriverEntryPoint.c
@@ -78,6 +78,7 @@ _DriverUnloadHandler (
                                      ProcessModuleEntryPointList().
 
 **/
+NO_STACK_COOKIE // MU_CHANGE: Project Mu Runtime Randomized Stack Cookie Support
 EFI_STATUS
 EFIAPI
 _ModuleEntryPoint (
diff --git a/MdePkg/Library/UefiApplicationEntryPoint/ApplicationEntryPoint.c b/MdePkg/Library/UefiApplicationEntryPoint/ApplicationEntryPoint.c
index 0a33e7a223..4f0458f5fd 100644
--- a/MdePkg/Library/UefiApplicationEntryPoint/ApplicationEntryPoint.c
+++ b/MdePkg/Library/UefiApplicationEntryPoint/ApplicationEntryPoint.c
@@ -29,6 +29,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
   @retval  Other                     Return value from ProcessModuleEntryPointList().
 
 **/
+NO_STACK_COOKIE // MU_CHANGE: Project Mu Runtime Randomized Stack Cookie Support
 EFI_STATUS
 EFIAPI
 _ModuleEntryPoint (
diff --git a/MdePkg/Library/UefiDriverEntryPoint/DriverEntryPoint.c b/MdePkg/Library/UefiDriverEntryPoint/DriverEntryPoint.c
index dc6445b8a5..0b47de7bc4 100644
--- a/MdePkg/Library/UefiDriverEntryPoint/DriverEntryPoint.c
+++ b/MdePkg/Library/UefiDriverEntryPoint/DriverEntryPoint.c
@@ -80,6 +80,7 @@ _DriverUnloadHandler (
   @retval  Other                     Return value from ProcessModuleEntryPointList().
 
 **/
+NO_STACK_COOKIE // MU_CHANGE: Project Mu Runtime Randomized Stack Cookie Support
 EFI_STATUS
 EFIAPI
 _ModuleEntryPoint (