diff --git a/src/libANGLE/renderer/vulkan/vk_helpers.cpp b/src/libANGLE/renderer/vulkan/vk_helpers.cpp
index 672ca4d92a..11355bd7dd 100644
--- a/src/libANGLE/renderer/vulkan/vk_helpers.cpp
+++ b/src/libANGLE/renderer/vulkan/vk_helpers.cpp
@@ -10645,6 +10645,18 @@ void ImageHelper::pruneSupersededUpdatesForLevel(ContextVk *contextVk,
                                                  const gl::LevelIndex level,
                                                  const PruneReason reason)
 {
+    // The bounding-box computation below for Clear/ClearAfterInvalidate updates
+    // depends on |mLayerCount| and |mExtents| (via getDestSubresource() and
+    // getLevelExtents()).  Those are stale defaults (0, {0,0,0}) until the
+    // VkImage is created, which would shrink a whole-level robust-init Clear's
+    // box to {0,0,0,1,1,1} and let a single-layer Buffer update wrongly
+    // supersede it, leaking uninitialized device memory for the remaining
+    // layers.  Defer the prune until the image properties are known.
+    if (!valid())
+    {
+        return;
+    }
+
     constexpr VkDeviceSize kSubresourceUpdateSizeBeforePruning = 16 * 1024 * 1024;  // 16 MB
     constexpr int kUpdateCountThreshold                        = 1024;
     SubresourceUpdates *levelUpdates                           = getLevelUpdates(level);