diff --git a/rpcs3/Emu/Cell/PPUModule.cpp b/rpcs3/Emu/Cell/PPUModule.cpp
index e709c7f25f..e898b6e201 100644
--- a/rpcs3/Emu/Cell/PPUModule.cpp
+++ b/rpcs3/Emu/Cell/PPUModule.cpp
@@ -1544,7 +1544,7 @@ void ppu_load_exec(const ppu_exec_object& elf)
 	case 0x70: primary_stacksize = 1024 * 1024; break; // SYS_PROCESS_PRIMARY_STACK_SIZE_1M
 	default:
 	{
-		primary_stacksize = sz >= 4096 ? ::align(std::min<u32>(sz, 0x100000), 4096) : 0x4000;
+		primary_stacksize = ::align<u32>(std::clamp<u32>(sz, 0x10000, 0x100000), 4096);
 		break;
 	}
 	}
diff --git a/rpcs3/Emu/Cell/lv2/sys_ppu_thread.cpp b/rpcs3/Emu/Cell/lv2/sys_ppu_thread.cpp
index 9c03369eb2..9aa0a9d200 100644
--- a/rpcs3/Emu/Cell/lv2/sys_ppu_thread.cpp
+++ b/rpcs3/Emu/Cell/lv2/sys_ppu_thread.cpp
@@ -307,7 +307,7 @@ error_code _sys_ppu_thread_create(vm::ptr<u64> thread_id, vm::ptr<ppu_thread_par
 	}
 
 	// Compute actual stack size and allocate
-	const u32 stack_size = _stacksz >= 4096 ? ::align(std::min<u32>(_stacksz, 0x100000), 4096) : 0x4000;
+	const u32 stack_size = ::align<u32>(std::max<u32>(_stacksz, 4096), 4096);
 
 	const vm::addr_t stack_base{vm::alloc(stack_size, vm::stack, 4096)};
 
diff --git a/rpcs3/Emu/Memory/vm.cpp b/rpcs3/Emu/Memory/vm.cpp
index e8cdbcb0dd..063577b868 100644
--- a/rpcs3/Emu/Memory/vm.cpp
+++ b/rpcs3/Emu/Memory/vm.cpp
@@ -709,7 +709,7 @@ namespace vm
 		}
 
 		// Return if size is invalid
-		if (!orig_size || !size || size > this->size)
+		if (!orig_size || !size || orig_size > size || size > this->size)
 		{
 			return 0;
 		}
@@ -764,7 +764,7 @@ namespace vm
 		const u32 size = ::align(orig_size, min_page_size);
 
 		// return if addr or size is invalid
-		if (!size || addr < this->addr || addr + u64{size} > this->addr + u64{this->size} || flags & 0x10)
+		if (!size || addr < this->addr || orig_size > size || addr + u64{size} > this->addr + u64{this->size} || flags & 0x10)
 		{
 			return 0;
 		}