diff --git a/sycl/test-e2e/AddressSanitizer/misaligned/misalign-long.cpp b/sycl/test-e2e/AddressSanitizer/misaligned/misalign-long.cpp
index 288feb18fe60c..9be29ab2bef4a 100644
--- a/sycl/test-e2e/AddressSanitizer/misaligned/misalign-long.cpp
+++ b/sycl/test-e2e/AddressSanitizer/misaligned/misalign-long.cpp
@@ -5,6 +5,9 @@
 // RUN: %{run} not --crash %t2.out 2>&1 | FileCheck %s
 // RUN: %{build} %device_asan_flags -O2 -g -o %t3.out
 // RUN: %{run} not --crash %t3.out 2>&1 | FileCheck %s
+// An unlimited stack selects Linux's legacy mmap layout, allowing Shared USM
+// addresses below the usual PVC range starting at 0x700000000000.
+// RUN: %if arch-intel_gpu_pvc %{ %{run} not --crash sh -c 'ulimit -s unlimited && exec "$@"' sh %t3.out 2>&1 | FileCheck %s %}
 #include <iostream>
 #include <sycl/detail/core.hpp>
 #include <sycl/usm.hpp>
diff --git a/unified-runtime/source/loader/layers/sanitizer/sanitizer_common/sanitizer_allocator.cpp b/unified-runtime/source/loader/layers/sanitizer/sanitizer_common/sanitizer_allocator.cpp
index 075558dab320d..9a3421ad64f7d 100644
--- a/unified-runtime/source/loader/layers/sanitizer/sanitizer_common/sanitizer_allocator.cpp
+++ b/unified-runtime/source/loader/layers/sanitizer/sanitizer_common/sanitizer_allocator.cpp
@@ -33,7 +33,14 @@ void validateSharedUSM([[maybe_unused]] uptr Allocated,
                        [[maybe_unused]] DeviceType DeviceType) {
   switch (DeviceType) {
   case DeviceType::GPU_PVC:
-    assert((Allocated >> 44) == 0x7);
+    // FIXME: ASan supports all lower 47-bit addresses, including Shared USM
+    // placed below 0x700000000000 by Linux. MSan/TSan discard more address
+    // bits, so relaxing their checks could alias shadow memory. They can still
+    // hit this assertion until their shadow mappings support the wider range.
+    if (getContext()->enabledType == SanitizerType::AddressSanitizer)
+      assert((Allocated >> 47) == 0);
+    else
+      assert((Allocated >> 44) == 0x7);
     break;
   default:
     break;