diff --git a/libs/ui/Region.cpp b/libs/ui/Region.cpp
index 3810da404..cfed7a984 100644
--- a/libs/ui/Region.cpp
+++ b/libs/ui/Region.cpp
@@ -795,6 +795,11 @@ status_t Region::unflatten(void const* buffer, size_t size) {
         return NO_MEMORY;
     }
 
+    if (numRects > (UINT32_MAX / sizeof(Rect))) {
+        android_errorWriteWithInfoLog(0x534e4554, "29983260", -1, NULL, 0);
+        return NO_MEMORY;
+    }
+
     Region result;
     result.mStorage.clear();
     for (size_t r = 0; r < numRects; ++r) {