diff --git a/numba_cuda/numba/cuda/cudadrv/driver.py b/numba_cuda/numba/cuda/cudadrv/driver.py
index ce3f4e626..5bd6419e6 100644
--- a/numba_cuda/numba/cuda/cudadrv/driver.py
+++ b/numba_cuda/numba/cuda/cudadrv/driver.py
@@ -39,6 +39,7 @@
     c_void_p,
     c_float,
     c_uint,
+    c_uint8,
 )
 import contextlib
 import importlib
@@ -3439,6 +3440,8 @@ def device_memset(dst, val, size, stream=0):
     size: number of byte to be written
     stream: a CUDA stream
     """
+    ptr = device_pointer(dst)
+
     varargs = []
 
     if stream:
@@ -3452,7 +3455,24 @@ def device_memset(dst, val, size, stream=0):
     else:
         fn = driver.cuMemsetD8
 
-    fn(device_pointer(dst), val, size, *varargs)
+    try:
+        fn(ptr, val, size, *varargs)
+    except CudaAPIError as e:
+        invalid = (
+            binding.CUresult.CUDA_ERROR_INVALID_VALUE
+            if USE_NV_BINDING
+            else enums.CUDA_ERROR_INVALID_VALUE
+        )
+        if (
+            e.code == invalid
+            and getattr(dst, "__cuda_memory__", False)
+            and getattr(dst, "is_managed", False)
+        ):
+            buf = (c_uint8 * size).from_address(host_pointer(dst))
+            byte = val & 0xFF
+            buf[:] = [byte] * size
+            return
+        raise
 
 
 def profile_start():
diff --git a/numba_cuda/numba/cuda/testing.py b/numba_cuda/numba/cuda/testing.py
index 9a7502280..8ae8027c4 100644
--- a/numba_cuda/numba/cuda/testing.py
+++ b/numba_cuda/numba/cuda/testing.py
@@ -242,6 +242,17 @@ def skip_on_arm(reason):
     return unittest.skipIf(is_arm, reason)
 
 
+def skip_on_wsl2(reason):
+    """Skip test when running under WSL2.
+
+    Detection is based on the kernel release string, which typically contains
+    "microsoft-standard-WSL2" on WSL2 systems.
+    """
+    rel = platform.release().lower()
+    is_wsl2 = ("microsoft-standard-wsl2" in rel) or ("wsl2" in rel)
+    return unittest.skipIf(is_wsl2, reason)
+
+
 def skip_if_cuda_includes_missing(fn):
     # Skip when cuda.h is not available - generally this should indicate
     # whether the CUDA includes are available or not
diff --git a/numba_cuda/numba/cuda/tests/cudapy/test_ipc.py b/numba_cuda/numba/cuda/tests/cudapy/test_ipc.py
index 4839042c5..2011664a3 100644
--- a/numba_cuda/numba/cuda/tests/cudapy/test_ipc.py
+++ b/numba_cuda/numba/cuda/tests/cudapy/test_ipc.py
@@ -14,6 +14,7 @@
     skip_on_arm,
     skip_on_cudasim,
     skip_under_cuda_memcheck,
+    skip_on_wsl2,
     ContextResettingTestCase,
     ForeignArray,
 )
@@ -93,6 +94,7 @@ def ipc_array_test(ipcarr, result_queue):
 @skip_under_cuda_memcheck("Hangs cuda-memcheck")
 @skip_on_cudasim("Ipc not available in CUDASIM")
 @skip_on_arm("CUDA IPC not supported on ARM in Numba")
+@skip_on_wsl2("CUDA IPC unreliable on WSL2; skipping IPC tests")
 class TestIpcMemory(ContextResettingTestCase):
     def test_ipc_handle(self):
         # prepare data for IPC
@@ -261,6 +263,7 @@ def staged_ipc_array_test(ipcarr, device_num, result_queue):
 @skip_under_cuda_memcheck("Hangs cuda-memcheck")
 @skip_on_cudasim("Ipc not available in CUDASIM")
 @skip_on_arm("CUDA IPC not supported on ARM in Numba")
+@skip_on_wsl2("CUDA IPC unreliable on WSL2; skipping IPC tests")
 class TestIpcStaged(ContextResettingTestCase):
     def test_staged(self):
         # prepare data for IPC