{"api_version":"1","generated_at":"2026-10-05T17:59:01+00:00","cve":"CVE-2026-97509","urls":{"html":"https://cve.report/CVE-2026-97509","api":"https://cve.report/api/cve/CVE-2026-97509.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-97509","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-97509"},"summary":{"title":"thunderbolt: Keep XDomain reference during the lifetime of a service","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 17:17:28","updated_at":"2026-10-03 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00:09:44"},"legacy_qids":[]},"source_records":{"cve_program":{"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","version":"d1ff70241a275133e1a0258b7c23588b122276c8","versionType":"git"},{"lessThan":"57359bb31526c2f1bb0a7b9b69d8b8a6bd3f0e9f","status":"affected","version":"d1ff70241a275133e1a0258b7c23588b122276c8","versionType":"git"},{"lessThan":"8ab12d015884b8aa85ea7ed58c5a0bae4264fe60","status":"affected","version":"d1ff70241a275133e1a0258b7c23588b122276c8","versionType":"git"},{"lessThan":"ea60ae6233ca0fc0d414e9c11f0d86c63b303fc7","status":"affected","version":"d1ff70241a275133e1a0258b7c23588b122276c8","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'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() → unregister_service() → 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."}]}],"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"},"nvd":{"publishedDate":"2026-09-24 17:17:28","lastModifiedDate":"2026-10-03 11:18:00","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"97509","Ordinal":"1","Title":"thunderbolt: Keep XDomain reference during the lifetime of a ser","CVE":"CVE-2026-97509","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"97509","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"thunderbolt: Keep XDomain reference during the lifetime of a ser"}]}}}