CVE-2026-98691 (GCVE-0-2026-98691)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:46 – Updated: 2026-10-19 09:24
VLAI
Title
thunderbolt: Tear down inactive DP tunnels when the domain is stopped
Summary
In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Tear down inactive DP tunnels when the domain is stopped tb_stop() only tears down DMA tunnels so a DP tunnel that is still waiting for dprx_work to complete keeps that work queued while the routers are removed and the control channel is stopped. The work only stops once the DPRX timeout has passed and because it requeues itself until then the flush_workqueue() in tb_domain_remove() won't wait for its final run. The callback then runs against a domain that is already torn down. A reference to that domain is kept so the completion waiting for that domain to disappear in unbind will block until the timeout is eventually reached. Tear down DP tunnels that are not active yet as well which also cancels that work. Tunnels for displays that are already alive are untouched and keep working.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6847 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d6d458d42e1e1544a18f37f1d5c840e00d5261b9 , < 34a6e27c954e5bfc29fead17867c7155d54b6481 (git)
Affected: d6d458d42e1e1544a18f37f1d5c840e00d5261b9 , < cbd2abb85ea32cafdcbaba218e13b18d8ed79bfa (git)
Affected: d6d458d42e1e1544a18f37f1d5c840e00d5261b9 , < 0b457c6733f73421a3fb03786f13d67c618b5119 (git)
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Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 6.18.56 , ≤ 6.18.* (semver)
Unaffected: 7.2.10 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/thunderbolt/tb.c"
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              "operator": "OR"
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      ],
      "descriptions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Tear down inactive DP tunnels when the domain is stopped\n\ntb_stop() only tears down DMA tunnels so a DP tunnel that is still\nwaiting for dprx_work to complete keeps that work queued while the\nrouters are removed and the control channel is stopped. The work only\nstops once the DPRX timeout has passed and because it requeues itself\nuntil then the flush_workqueue() in tb_domain_remove() won\u0027t wait for its\nfinal run. The callback then runs against a domain that is already torn\ndown. A reference to that domain is kept so the completion waiting for\nthat domain to disappear in unbind will block until the timeout is\neventually reached.\n\nTear down DP tunnels that are not active yet as well which also cancels\nthat work. Tunnels for displays that are already alive are untouched and\nkeep working."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:24:01.186Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98691",
    "datePublished": "2026-10-18T15:46:15.299Z",
    "dateReserved": "2026-09-25T10:25:14.364Z",
    "dateUpdated": "2026-10-19T09:24:01.186Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "product_status:under_investigation": "1",
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      "title": "thunderbolt: Tear down inactive DP tunnels when the domain is stopped",
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    "nvd": {
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Tear down inactive DP tunnels when the domain is stopped\n\ntb_stop() only tears down DMA tunnels so a DP tunnel that is still\nwaiting for dprx_work to complete keeps that work queued while the\nrouters are removed and the control channel is stopped. The work only\nstops once the DPRX timeout has passed and because it requeues itself\nuntil then the flush_workqueue() in tb_domain_remove() won\u0027t wait for its\nfinal run. The callback then runs against a domain that is already torn\ndown. A reference to that domain is kept so the completion waiting for\nthat domain to disappear in unbind will block until the timeout is\neventually reached.\n\nTear down DP tunnels that are not active yet as well which also cancels\nthat work. Tunnels for displays that are already alive are untouched and\nkeep working."
          }
        ],
        "id": "CVE-2026-98691",
        "lastModified": "2026-10-19T10:19:33.460",
        "metrics": {},
        "published": "2026-10-18T16:17:22.523",
        "references": [
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      "product_status:known_affected": "185",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: thunderbolt: Tear down inactive DP tunnels when the domain is stopped",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98691.json",
      "version": "3"
    }
  }
}



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