CVE-2026-98692

Status: ReceivedUnscored—

Severity—Unscored

Exploitation probability0.15 %higher than 4% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

In the Linux kernel, the following vulnerability has been resolved:

thunderbolt: Make the DP tunnel activation callback mandatory

tb_tunnel_alloc_dp() takes an optional callback which is run from dprx_work once the DPRX capabilities read has completed. Without that callback tb_dp_dprx_start() reads the capabilities synchronously and never queues the work. It however always takes a tunnel reference which is only dropped by dprx_work itself or by tb_dp_dprx_stop() when cancel_delayed_work() actually canceled that work. That reference is thus leaked for every tunnel without a callback.

The only tunnels without one are those from tb_tunnel_discover_dp(), which are activated again when restoring from hibernation.

Read full descriptionShow less

Pass the callback to tb_tunnel_discover_dp() as well and drop the synchronous path such that the DPRX capabilities are always read from dprx_work. Hibernation restore then also no longer blocks for up to 12 seconds while waiting for that read to complete.

Also fix up the KUnit tests.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.15 %
Percentile among all scored CVEs: 4
Score date: 10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux Kernel^AI

References

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Raw JSON (NVD)

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{
  "id": "CVE-2026-98692",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "d6d458d42e1e1544a18f37f1d5c840e00d5261b9",
              "lessThan": "47d60ea801fc333a10c576691eca2e7840b02d3d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d6d458d42e1e1544a18f37f1d5c840e00d5261b9",
              "lessThan": "12f5d8b85a66a0ac08d082517d92ce136f8c0d42",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/thunderbolt/tb.c",
            "drivers/thunderbolt/test.c",
            "drivers/thunderbolt/tunnel.c",
            "drivers/thunderbolt/tunnel.h"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.14",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/thunderbolt/tb.c",
            "drivers/thunderbolt/test.c",
            "drivers/thunderbolt/tunnel.c",
            "drivers/thunderbolt/tunnel.h"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-18T16:17:22.623",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/12f5d8b85a66a0ac08d082517d92ce136f8c0d42",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/47d60ea801fc333a10c576691eca2e7840b02d3d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Make the DP tunnel activation callback mandatory\n\ntb_tunnel_alloc_dp() takes an optional callback which is run from\ndprx_work once the DPRX capabilities read has completed. Without that\ncallback tb_dp_dprx_start() reads the capabilities synchronously and\nnever queues the work. It however always takes a tunnel reference which\nis only dropped by dprx_work itself or by tb_dp_dprx_stop() when\ncancel_delayed_work() actually canceled that work. That reference is\nthus leaked for every tunnel without a callback.\n\nThe only tunnels without one are those from tb_tunnel_discover_dp(),\nwhich are activated again when restoring from hibernation.\nPass the callback to tb_tunnel_discover_dp() as well and drop the\nsynchronous path such that the DPRX capabilities are always read from\ndprx_work. Hibernation restore then also no longer blocks for up to 12\nseconds while waiting for that read to complete.\n\nAlso fix up the KUnit tests."
    }
  ],
  "lastModified": "2026-10-19T10:19:33.553",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}