CVE-2026-97509 (GCVE-0-2026-97509)
Vulnerability from cvelistv5
Published
2026-09-24 16:05
Modified
2026-10-03 10:59
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Keep XDomain reference during the lifetime of a service This is needed because we release the service ID in tb_service_release() and the ID array is owned by the parent XDomain.
References
Impacted products
Vendor Product Version
Linux Linux Version: d1ff70241a275133e1a0258b7c23588b122276c8
Version: d1ff70241a275133e1a0258b7c23588b122276c8
Version: d1ff70241a275133e1a0258b7c23588b122276c8
Version: d1ff70241a275133e1a0258b7c23588b122276c8
Version: d1ff70241a275133e1a0258b7c23588b122276c8
Version: d1ff70241a275133e1a0258b7c23588b122276c8
Version: d1ff70241a275133e1a0258b7c23588b122276c8
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/thunderbolt/xdomain.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a4567e5380e4e46d0ea9a28d2d675e5c6f013d54",
              "status": "affected",
              "version": "d1ff70241a275133e1a0258b7c23588b122276c8",
              "versionType": "git"
            },
            {
              "lessThan": "daeaa6c7211d03ed061b0dd22a875fad9372b090",
              "status": "affected",
              "version": "d1ff70241a275133e1a0258b7c23588b122276c8",
              "versionType": "git"
            },
            {
              "lessThan": "cca72fe513f3d6b1279fe83483f8a8990adbe0c6",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "8b4060998637f06975fceee9b73845d8672d411e",
              "status": "affected",
              "version": "d1ff70241a275133e1a0258b7c23588b122276c8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/thunderbolt/xdomain.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.266",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.217",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.266",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.217",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - enumerate_services() runs from tb_xdomain_get_properties() after the peer\u0027s PROPERTIES_RESPONSE (tb_xdp_properties_request on the Thunderbolt/USB4 control channel) so tb_service children exist; the same peer\u0027s 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(\u0026xd-\u003edev), then dropping the link runs tb_xdomain_unregister() \u2192 unregister_service() \u2192 device_del() put_device(parent) before tb_service_release() uses xd-\u003eservice_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-\u003edev.parent-\u003etype) and ida_free(\u0026xd-\u003eservice_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\u0027d 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:59:07.153Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a4567e5380e4e46d0ea9a28d2d675e5c6f013d54"
        },
        {
          "url": "https://git.kernel.org/stable/c/daeaa6c7211d03ed061b0dd22a875fad9372b090"
        },
        {
          "url": "https://git.kernel.org/stable/c/cca72fe513f3d6b1279fe83483f8a8990adbe0c6"
        },
        {
          "url": "https://git.kernel.org/stable/c/57359bb31526c2f1bb0a7b9b69d8b8a6bd3f0e9f"
        },
        {
          "url": "https://git.kernel.org/stable/c/8ab12d015884b8aa85ea7ed58c5a0bae4264fe60"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea60ae6233ca0fc0d414e9c11f0d86c63b303fc7"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b4060998637f06975fceee9b73845d8672d411e"
        }
      ],
      "title": "thunderbolt: Keep XDomain reference during the lifetime of a service",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97509",
    "datePublished": "2026-09-24T16:05:04.487Z",
    "dateReserved": "2026-09-24T16:01:01.151Z",
    "dateUpdated": "2026-10-03T10:59:07.153Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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