{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.13-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  firmware: stratix10-rsu: Fix NULL deref on rsu_send_msg() timeout in probe  rsu_send_msg() can return -ETIMEDOUT when wait_for_completion_interruptible_timeout() fires while the SMC call is still pending. In stratix10_rsu_probe(), the error paths for COMMAND_RSU_DCMF_VERSION, COMMAND_RSU_DCMF_STATUS, COMMAND_RSU_MAX_RETRY and COMMAND_RSU_GET_SPT_TABLE call stratix10_svc_free_channel() - which sets chan-\u003escl to NULL - but then fall through and queue the next request on the same channel. The next svc kthread that runs will dereference pdata-\u003echan-\u003escl in its receive callback path, triggering a NULL pointer dereference identical to the one fixed by commit c45f7263100c (\"firmware: stratix10-rsu: Fix NULL pointer dereference when RSU is disabled\") for the COMMAND_RSU_STATUS path.  Apply the same cleanup pattern to the remaining failure paths: remove the async client, free the channel, and return early so no further messages are queued on a channel whose scl has been cleared.  While at it, clean up stratix10_rsu_probe() in two ways without changing behavior:  - Drop redundant zero-initialization of fields already cleared by   devm_kzalloc(): client.receive_cb, status.* and spt0/1_address   (INVALID_SPT_ADDRESS is 0x0).  - Replace five identical 3-line error-cleanup blocks   (stratix10_svc_remove_async_client() + stratix10_svc_free_channel() +   return ret) with goto labels (remove_async_client, free_channel),   matching the standard kernel resource-unwinding pattern and making it   easier to extend the probe sequence without forgetting matching   cleanup.  Also move init_completion() next to mutex_init() so sync-primitive initialization is grouped before anything that could trigger a callback.  --- v2: Add a minor clean-up of the function stratix10_rsu_probe() to have a     centralize exit for all the rsu_send_async_msg() and rsu_send_msg().",
  "id": "DEBIAN-CVE-2026-53204",
  "modified": "2026-09-14T16:47:39.920529230Z",
  "published": "2026-06-25T09:16:37.960Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-53204"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-53204"
  ]
}