CVE-2025-38174 (GCVE-0-2025-38174)

Vulnerability from cvelistv5 – Published: 2025-07-04 10:39 – Updated: 2026-08-05 12:00
VLAI
Title
thunderbolt: Do not double dequeue a configuration request
Summary
In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Do not double dequeue a configuration request Some of our devices crash in tb_cfg_request_dequeue(): general protection fault, probably for non-canonical address 0xdead000000000122 CPU: 6 PID: 91007 Comm: kworker/6:2 Tainted: G U W 6.6.65 RIP: 0010:tb_cfg_request_dequeue+0x2d/0xa0 Call Trace: <TASK> ? tb_cfg_request_dequeue+0x2d/0xa0 tb_cfg_request_work+0x33/0x80 worker_thread+0x386/0x8f0 kthread+0xed/0x110 ret_from_fork+0x38/0x50 ret_from_fork_asm+0x1b/0x30 The circumstances are unclear, however, the theory is that tb_cfg_request_work() can be scheduled twice for a request: first time via frame.callback from ring_work() and second time from tb_cfg_request(). Both times kworkers will execute tb_cfg_request_dequeue(), which results in double list_del() from the ctl->request_queue (the list poison deference hints at it: 0xdead000000000122). Do not dequeue requests that don't have TB_CFG_REQUEST_ACTIVE bit set.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 16603153666d22df544ae9f9b3764fd18da28eeb , < e49e994cd83705f7ca30eda1e304abddfd96a37a (git)
Affected: 16603153666d22df544ae9f9b3764fd18da28eeb , < 0a3011d47dbc92a33621861c423cb64833d7fe57 (git)
Affected: 16603153666d22df544ae9f9b3764fd18da28eeb , < 2f62eda4d974c26bc595425eafd429067541f2c9 (git)
Affected: 16603153666d22df544ae9f9b3764fd18da28eeb , < 85286e634ebbaf9c0fb1cdf580add2f33fc7628c (git)
Affected: 16603153666d22df544ae9f9b3764fd18da28eeb , < 5a057f261539720165d03d85024da2b52e67f63d (git)
Affected: 16603153666d22df544ae9f9b3764fd18da28eeb , < eb2d5e794fb966b3ef8bde99eb8561446a53509f (git)
Affected: 16603153666d22df544ae9f9b3764fd18da28eeb , < 0771bcbe2f6e5d5f263cf466efe571d2754a46da (git)
Affected: 16603153666d22df544ae9f9b3764fd18da28eeb , < cdb4feab2f39e75a66239e3a112beced279612a8 (git)
Affected: 16603153666d22df544ae9f9b3764fd18da28eeb , < 0f73628e9da1ee39daf5f188190cdbaee5e0c98c (git)
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Linux Linux Affected: 3.17
Unaffected: 0 , < 3.17 (semver)
Unaffected: 5.4.295 , ≤ 5.4.* (semver)
Unaffected: 5.10.239 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.94 , ≤ 6.6.* (semver)
Unaffected: 6.12.33 , ≤ 6.12.* (semver)
Unaffected: 6.14.11 , ≤ 6.14.* (semver)
Unaffected: 6.15.2 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Do not double dequeue a configuration request\n\nSome of our devices crash in tb_cfg_request_dequeue():\n\n general protection fault, probably for non-canonical address 0xdead000000000122\n\n CPU: 6 PID: 91007 Comm: kworker/6:2 Tainted: G U W 6.6.65\n RIP: 0010:tb_cfg_request_dequeue+0x2d/0xa0\n Call Trace:\n \u003cTASK\u003e\n ? tb_cfg_request_dequeue+0x2d/0xa0\n tb_cfg_request_work+0x33/0x80\n worker_thread+0x386/0x8f0\n kthread+0xed/0x110\n ret_from_fork+0x38/0x50\n ret_from_fork_asm+0x1b/0x30\n\nThe circumstances are unclear, however, the theory is that\ntb_cfg_request_work() can be scheduled twice for a request:\nfirst time via frame.callback from ring_work() and second\ntime from tb_cfg_request().  Both times kworkers will execute\ntb_cfg_request_dequeue(), which results in double list_del()\nfrom the ctl-\u003erequest_queue (the list poison deference hints\nat it: 0xdead000000000122).\n\nDo not dequeue requests that don\u0027t have TB_CFG_REQUEST_ACTIVE\nbit set."
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              "value": "AV:A - The vulnerable control-channel request queue is driven by packets received over the Thunderbolt/USB4 fabric, and the trigger is fully reachable by a peer host or device on the other end of a Thunderbolt link via the XDomain protocol (`tb_xdomain_handle_request()` \u2192 `tb_xdp_handle_request()` \u2192 `__tb_xdomain_response()`), matching the adjacent-topology model used for other Thunderbolt XDomain issues.\nAC:L - The attacker controls both sides of the race \u2014 it elicits the host\u0027s XDomain response (which is queued with `TB_CFG_REQUEST_ACTIVE` and immediately `schedule_work()`ed because `req-\u003eresponse` is NULL) and then injects a matching `XDOMAIN_RESP`/`ERROR` packet to schedule the same work a second time, with unlimited retries and no attacker-independent preconditions.\nPR:N - XDomain discovery requests are processed and answered before any device authorization or security-level gate (UUID/unknown-type requests are answered even when no `tb_xdomain` is registered), so no credentials or privileges on the target are required.\nUI:N - Once a Thunderbolt link exists (dock, daisy chain, host-to-host cable, or a device the attacker attaches), the attack proceeds purely from attacker-sent control packets with no action by the local user.\nS:U - The corruption and its consequences are confined to the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The duplicated work run drops an extra `tb_cfg_request_put()`, freeing the request while a second `tb_cfg_request_work()` still reads it \u2014 a use-after-free on a ~192\u2013256 byte kmalloc object that, combined with the attacker-controlled `kmemdup()` spray in `tb_xdp_schedule_request()`, yields a kernel memory disclosure primitive.\nI:H - The second run of the work item calls `req-\u003ecallback(req-\u003ecallback_data)` and `mutex_lock(\u0026req-\u003ectl-\u003erequest_queue_lock)`/`list_del()` on freed, reallocatable memory, giving an indirect call through an attacker-groomed function pointer plus list-based write primitives, i.e. potential control-flow hijack.\nA:H - The reported and readily reproduced outcome is a general protection fault in a kworker from the double `list_del()` on list poison, killing the worker while holding `ctl-\u003erequest_queue_lock`, which oopses the kernel and wedges the Thunderbolt control channel."
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                "negate": false,
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          {
            "nodes": [
              {
                "cpeMatch": [
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                    "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Do not double dequeue a configuration request\n\nSome of our devices crash in tb_cfg_request_dequeue():\n\n general protection fault, probably for non-canonical address 0xdead000000000122\n\n CPU: 6 PID: 91007 Comm: kworker/6:2 Tainted: G U W 6.6.65\n RIP: 0010:tb_cfg_request_dequeue+0x2d/0xa0\n Call Trace:\n \u003cTASK\u003e\n ? tb_cfg_request_dequeue+0x2d/0xa0\n tb_cfg_request_work+0x33/0x80\n worker_thread+0x386/0x8f0\n kthread+0xed/0x110\n ret_from_fork+0x38/0x50\n ret_from_fork_asm+0x1b/0x30\n\nThe circumstances are unclear, however, the theory is that\ntb_cfg_request_work() can be scheduled twice for a request:\nfirst time via frame.callback from ring_work() and second\ntime from tb_cfg_request().  Both times kworkers will execute\ntb_cfg_request_dequeue(), which results in double list_del()\nfrom the ctl-\u003erequest_queue (the list poison deference hints\nat it: 0xdead000000000122).\n\nDo not dequeue requests that don\u0027t have TB_CFG_REQUEST_ACTIVE\nbit set."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: thunderbolt: no desencolar dos veces una solicitud de configuraci\u00f3n Algunos de nuestros dispositivos fallan en tb_cfg_request_dequeue(): error de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0xdead000000000122 CPU: 6 PID: 91007 Comm: kworker/6:2 Tainted: GUW 6.6.65 RIP: 0010:tb_cfg_request_dequeue+0x2d/0xa0 Rastreo de llamadas:  ? tb_cfg_request_dequeue+0x2d/0xa0 tb_cfg_request_work+0x33/0x80 worker_thread+0x386/0x8f0 kthread+0xed/0x110 ret_from_fork+0x38/0x50 ret_from_fork_asm+0x1b/0x30 Las circunstancias no est\u00e1n claras, sin embargo, la teor\u00eda es que tb_cfg_request_work() se puede programar dos veces para una solicitud: la primera vez a trav\u00e9s de frame.callback desde ring_work() y la segunda vez desde tb_cfg_request(). En ambas ocasiones, los kworkers ejecutar\u00e1n tb_cfg_request_dequeue(), lo que resulta en un doble list_del() desde ctl-\u0026gt;request_queue (la deferencia de envenenamiento de lista lo insin\u00faa: 0xdead000000000122). No saque de la cola las solicitudes que no tengan establecido el bit TB_CFG_REQUEST_ACTIVE."
          }
        ],
        "id": "CVE-2025-38174",
        "lastModified": "2026-07-30T06:22:57.100",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-07-04T11:15:51.283",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0771bcbe2f6e5d5f263cf466efe571d2754a46da"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
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              "Patch"
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          },
          {
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            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          },
          {
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            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
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    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:24:21+00:00",
      "cve": "CVE-2025-38174",
      "id": "CVE-2025-38174",
      "initial_release_date": "2025-07-04T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: thunderbolt: Do not double dequeue a configuration request",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38174.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-30T01:56:33Z",
      "cve": "CVE-2025-38174",
      "id": "CVE-2025-38174",
      "initial_release_date": "2025-07-04T23:22:24Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "398",
      "product_status:known_not_affected": "387",
      "product_status:recommended": "495",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38174",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38174.json",
      "version": "47"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.