diff --git a/src/libANGLE/renderer/vulkan/vk_helpers.cpp b/src/libANGLE/renderer/vulkan/vk_helpers.cpp
index 1429619383..5523127392 100644
--- a/src/libANGLE/renderer/vulkan/vk_helpers.cpp
+++ b/src/libANGLE/renderer/vulkan/vk_helpers.cpp
@@ -9818,7 +9818,22 @@ void ImageHelper::stageSelfAsSubresourceUpdates(
                                       << mFirstAllocatedLevel.get());
     const gl::TexLevelMask skipLevelsAllFaces = AggregateSkipLevels(skipLevels);
 
-    if ((~skipLevelsAllFaces & levelsMask).none())
+    // For cube maps, a level can only be skipped entirely if *every* face of
+    // that level is being redefined.  AggregateSkipLevels() OR-aggregates the
+    // per-face masks, which is correct for "is any face of this level
+    // redefined?" but wrong for "can the whole level be dropped?".  Using the
+    // OR-aggregated mask here would silently discard the non-redefined faces'
+    // pixel data when the VkImage is released by the caller.  Use the
+    // intersection (AND) of the per-face masks for the early-return test.
+    gl::TexLevelMask skipLevelsEveryFace = skipLevels[0];
+    if (textureType == gl::TextureType::CubeMap)
+    {
+        for (size_t face = 1; face < gl::kCubeFaceCount; ++face)
+        {
+            skipLevelsEveryFace &= skipLevels[face];
+        }
+    }
+    if ((~skipLevelsEveryFace & levelsMask).none())
     {
         return;
     }