diff --git a/homeassistant/components/cpuspeed/sensor.py b/homeassistant/components/cpuspeed/sensor.py
index 686a7c13e58..8d21b365ad6 100644
--- a/homeassistant/components/cpuspeed/sensor.py
+++ b/homeassistant/components/cpuspeed/sensor.py
@@ -81,8 +81,8 @@ class CPUSpeedSensor(SensorEntity):
 
         if info:
             self._attr_extra_state_attributes = {
-                ATTR_ARCH: info["arch_string_raw"],
-                ATTR_BRAND: info["brand_raw"],
+                ATTR_ARCH: info.get("arch_string_raw"),
+                ATTR_BRAND: info.get("brand_raw"),
             }
             if HZ_ADVERTISED in info:
                 self._attr_extra_state_attributes[ATTR_HZ] = round(
diff --git a/tests/components/cpuspeed/test_sensor.py b/tests/components/cpuspeed/test_sensor.py
index 134d19b31ea..ebf9f0111bd 100644
--- a/tests/components/cpuspeed/test_sensor.py
+++ b/tests/components/cpuspeed/test_sensor.py
@@ -61,3 +61,25 @@ async def test_sensor(
     assert state.attributes.get(ATTR_ARCH) == "aargh"
     assert state.attributes.get(ATTR_BRAND) == "Intel Ryzen 7"
     assert state.attributes.get(ATTR_HZ) == 3.6
+
+
+async def test_sensor_partial_info(
+    hass: HomeAssistant,
+    mock_cpuinfo: MagicMock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test the CPU Speed sensor missing info."""
+    mock_config_entry.add_to_hass(hass)
+
+    # Pop some info from the mocked CPUSpeed
+    mock_cpuinfo.return_value.pop("brand_raw")
+    mock_cpuinfo.return_value.pop("arch_string_raw")
+
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    state = hass.states.get("sensor.cpu_speed")
+    assert state
+    assert state.state == "3.2"
+    assert state.attributes.get(ATTR_ARCH) is None
+    assert state.attributes.get(ATTR_BRAND) is None