diff --git a/third_party/blink/renderer/modules/xr/xr_webgl_swap_chain.cc b/third_party/blink/renderer/modules/xr/xr_webgl_swap_chain.cc
index 7bb3991d04f36..9cbeaa7c51327 100644
--- a/third_party/blink/renderer/modules/xr/xr_webgl_swap_chain.cc
+++ b/third_party/blink/renderer/modules/xr/xr_webgl_swap_chain.cc
@@ -69,6 +69,18 @@ void XRWebGLSwapChain::ClearCurrentTexture() {
 
   gl->Disable(GL_SCISSOR_TEST);
 
+  // GL_RASTERIZER_DISCARD is page-settable in WebGL2 and causes ANGLE's
+  // Context::clear() to silently no-op. This is the security clear of an
+  // XR-runtime-supplied texture (which on Android is an un-zeroed
+  // AHardwareBuffer falsely marked SetCleared()), so it must not be skipped.
+  GLboolean rasterizer_discard_was_enabled = GL_FALSE;
+  if (webgl2()) {
+    rasterizer_discard_was_enabled = gl->IsEnabled(GL_RASTERIZER_DISCARD);
+    if (rasterizer_discard_was_enabled) {
+      gl->Disable(GL_RASTERIZER_DISCARD);
+    }
+  }
+
   if (descriptor_.is_texture_array) {
     DLOG(ERROR) << __func__ << " Performing texture array clear";
     for (uint32_t i = 0; i < descriptor_.layers; ++i) {
@@ -92,6 +104,10 @@ void XRWebGLSwapChain::ClearCurrentTexture() {
   }
   gl->Flush();
 
+  if (rasterizer_discard_was_enabled) {
+    gl->Enable(GL_RASTERIZER_DISCARD);
+  }
+
   // WebGLRenderingContextBase inherits from DrawingBuffer::Client, but makes
   // all the methods private. Downcasting allows us to access them.
   DrawingBuffer::Client* client =