{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "15847537b623f844d9a08da99ff4568315e1d4f8"
            },
            {
              "fixed": "6bc249d324241c64118a3018124798c28e2950f7"
            },
            {
              "fixed": "bfd2eb9bba548a8f63c3339bb1fb9a2031a42d86"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53204.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: stratix10-rsu: Fix NULL deref on rsu_send_msg() timeout in probe\n\nrsu_send_msg() can return -ETIMEDOUT when\nwait_for_completion_interruptible_timeout() fires while the SMC call is still\npending. In stratix10_rsu_probe(), the error paths for COMMAND_RSU_DCMF_VERSION,\nCOMMAND_RSU_DCMF_STATUS, COMMAND_RSU_MAX_RETRY and COMMAND_RSU_GET_SPT_TABLE\ncall stratix10_svc_free_channel() - which sets chan-\u003escl to NULL - but then\nfall through and queue the next request on the same channel. The next svc\nkthread that runs will dereference pdata-\u003echan-\u003escl in its receive callback\npath, triggering a NULL pointer dereference identical to the one fixed by\ncommit c45f7263100c (\"firmware: stratix10-rsu: Fix NULL pointer dereference\nwhen RSU is disabled\") for the COMMAND_RSU_STATUS path.\n\nApply the same cleanup pattern to the remaining failure paths: remove the\nasync client, free the channel, and return early so no further messages are\nqueued on a channel whose scl has been cleared.\n\nWhile at it, clean up stratix10_rsu_probe() in two ways without changing\nbehavior:\n\n- Drop redundant zero-initialization of fields already cleared by\n  devm_kzalloc(): client.receive_cb, status.* and spt0/1_address\n  (INVALID_SPT_ADDRESS is 0x0).\n\n- Replace five identical 3-line error-cleanup blocks\n  (stratix10_svc_remove_async_client() + stratix10_svc_free_channel() +\n  return ret) with goto labels (remove_async_client, free_channel),\n  matching the standard kernel resource-unwinding pattern and making it\n  easier to extend the probe sequence without forgetting matching\n  cleanup.\n\nAlso move init_completion() next to mutex_init() so sync-primitive\ninitialization is grouped before anything that could trigger a\ncallback.\n\n---\nv2: Add a minor clean-up of the function stratix10_rsu_probe() to have a\n    centralize exit for all the rsu_send_async_msg() and rsu_send_msg().",
  "id": "CVE-2026-53204",
  "modified": "2026-07-08T05:39:04.143488906Z",
  "published": "2026-06-25T08:39:11.618Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6bc249d324241c64118a3018124798c28e2950f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bfd2eb9bba548a8f63c3339bb1fb9a2031a42d86"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53204.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53204"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "firmware: stratix10-rsu: Fix NULL deref on rsu_send_msg() timeout in probe"
}