--- a/src/libANGLE/renderer/vulkan/VkImageImageSiblingVk.cpp
+++ b/src/libANGLE/renderer/vulkan/VkImageImageSiblingVk.cpp
@@ -53,6 +53,19 @@ angle::Result VkImageImageSiblingVk::initImpl(DisplayVk *displayVk)
                                                      ? vk::ImageFormatSupport::Renderable
                                                      : vk::ImageFormatSupport::SampleOnly;
     angle::FormatID actualImageFormatID        = vkFormat.getActualImageFormatID(formatSupport);
+    // The wrapped VkImage was already created by the caller with
+    // |mVkImageInfo.format|.  ANGLE's per-driver fallback table
+    // (getActualImageFormatID) is only valid when ANGLE is *creating* the
+    // image; when wrapping, the format is fixed and any view must use it.
+    // If the fallback differs (e.g. R4G4B4A4 -> R8G8B8A8 on drivers without
+    // BLEND for R4G4B4A4), creating a view in the fallback format violates
+    // VUID-VkImageViewCreateInfo-image-12397/01762 and is driver UB at a
+    // different bytes-per-pixel.  Reject instead of corrupting memory.
+    if (vk::GetVkFormatFromFormatID(renderer, actualImageFormatID) != mVkImageInfo.format)
+    {
+        actualImageFormatID = formatID;
+    }
+
     if (renderer->getFeatures().preferBGR565ToRGB565.enabled &&
         formatID == angle::FormatID::R5G6B5_UNORM &&
         actualImageFormatID == angle::FormatID::B5G6R5_UNORM)