{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-97509",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-97509"
  ],
  "published": "2026-09-24T16:08:25Z",
  "summary": "thunderbolt: Keep XDomain reference during the lifetime of a service",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Keep XDomain reference during the lifetime of a service\n\nThis is needed because we release the service ID in tb_service_release()\nand the ID array is owned by the parent XDomain.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.189",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-97509"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a4567e5380e4e46d0ea9a28d2d675e5c6f013d54"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/daeaa6c7211d03ed061b0dd22a875fad9372b090"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cca72fe513f3d6b1279fe83483f8a8990adbe0c6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/57359bb31526c2f1bb0a7b9b69d8b8a6bd3f0e9f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8ab12d015884b8aa85ea7ed58c5a0bae4264fe60"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ea60ae6233ca0fc0d414e9c11f0d86c63b303fc7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8b4060998637f06975fceee9b73845d8672d411e"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-10-03T11:04:09Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:A - enumerate_services() runs from tb_xdomain_get_properties() after the peer's PROPERTIES_RESPONSE (tb_xdp_properties_request on the Thunderbolt/USB4 control channel) so tb_service children exist; the same peer's link-down hits tb_handle_hotplug() then tb_xdomain_unregister(). That is the TB fabric, not a routable IP protocol.\nAC:L - The peer controls both sides: property-block directories make enumerate_services() device_register() services without get_device(&xd->dev), then dropping the link runs tb_xdomain_unregister() \u2192 unregister_service() \u2192 device_del() put_device(parent) before tb_service_release() uses xd->service_ids. Advertise/unplug can be retried; no attacker-independent fault is required.\nPR:N - tb_domain_event_cb delivers TB_CFG_PKG_XDOMAIN_REQ/RESP to tb_xdomain_handle_request whenever tb_is_xdomain_enabled() (xdomain module_param defaults true, plus ACPI OSC). UUID/property handshake and enumerate_services() run with no device authorization or local credentials on the victim.\nUI:N - tb_xdomain_add() starts the handshake by itself; enumerate_services() and later tb_xdomain_unregister() (tb_domain_unregister_unplugged_xdomains after unplug) run from the connection-manager hotplug path with no victim mount, sysfs write, or authorization dialog.\nS:U - tb_service_release() ida_free()s the already-freed tb_xdomain.service_ids IDA in the host kernel; that does not cross a VM, IOMMU, or sandbox boundary.\nC:H - After tb_xdomain_release() kfree()s the XDomain, tb_service_release() calls tb_service_parent() (reads svc->dev.parent->type) and ida_free(&xd->service_ids). That slab UAF of struct tb_xdomain can be reclaimed for an arbitrary kernel read.\nI:H - ida_free() writes the IDA/XArray embedded in the already-freed tb_xdomain; a sprayed replacement object is a kernel write and control-flow hijack primitive, as in other parent-IDA lifetime UAFs.\nA:H - tb_service_release() on a kfree'd tb_xdomain (parent type-check or ida_free of destroyed service_ids) oopses or panics the host; the peer can repeat advertise-and-unplug cycles to take Thunderbolt down."
    }
  }
}