* An `automountServiceAccountToken` field was added to ServiceAccount and PodSpec objects. If set to `false` on a pod spec, no service account token is automounted in the pod. If set to `false` on a service account, no service account token is automounted for that service account unless explicitly overridden in the pod spec. ([#37953](https://github.com/kubernetes/kubernetes/pull/37953), [@ligg...

    assert not override3 or "x-level3" in response.headers


@pytest.mark.parametrize("override1", [True, False])
@pytest.mark.parametrize("override2", [True, False])
@pytest.mark.parametrize("override3", [True, False])
@pytest.mark.parametrize("override4", [True, False])
@pytest.mark.parametrize("override5", [True, False])
def test_paths_level5(override1, override2, override3, override4, override5):
    url = ""

* Changes secret, configMap, downwardAPI and projected volumes to mount read-only, instead of allowing applications to write data and then reverting it automatically. Until version 1.11, setting the feature gate ReadOnlyAPIDataVolumes=false will preserve the old behavior. ([#58720](https://github.com/kubernetes/kubernetes/pull/58720), [@joelsmith](https://github.com/joelsmith))

  - `resourceclaim_controller_creates_total` count metric with labels `admin_access` (true or false), `status` (failure or success) to track the total number of `ResourceClaims` creation requests

* [IPVS] Introduces flag ipvs-strict-arp to configure stricter ARP sysctls, defaulting to false to preserve existing behaviors. This was enabled by default in 1.13.0, which impacted a few CNI plugins. ([#75295](https://github.com/kubernetes/kubernetes/pull/75295), [@lbernail](https://github.com/lbernail))

  * Bug fixes

    * Fix some false negatives in detection of meaningful conflicts during strategic merge patch with maps and lists. ([#43469](https://github.com/kubernetes/kubernetes/pull/43469), [@enisoc](https://github.com/enisoc))

  - Client-side (kubectl) feature gate: `KUBECTL_REMOTE_COMMAND_WEBSOCKETS`
  - To disable RemoteCommand over WebSockets for kubectl, the environment variable feature gate must be explicitly set to `false`: `KUBECTL_REMOTE_COMMAND_WEBSOCKETS=false`.
   ([#123281](https://github.com/kubernetes/kubernetes/pull/123281), [@seans3](https://github.com/seans3))

### Bug or Regression

- Bump system-validators to v1.9.2: remove version-specific cgroup kernel config checks to avoid false failures on cgroup v2 systems when v1-only configs are missing. ([#134086](https://github.com/kubernetes/kubernetes/pull/134086), [@pacoxu](https://github.com/pacoxu)) [SIG Cluster Lifecycle]

- Add CRD spec.preserveUnknownFields boolean, defaulting to true in v1beta1 and to false in v1 CRDs. If false, fields not specified in the validation schema will be removed when sent to the API server or when read from etcd. ([#77333](https://github.com/kubernetes/kubernetes/pull/77333), [@sttts](https://github.com/sttts))

  Example: suppose you develop a custom plugin that denies Pods that have a `schedulable=false` label.