FKIE_CVE-2026-100079

Vulnerability from fkie_nvd - Published: 2026-09-25 14:17 - Updated: 2026-09-25 14:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: unregister debugfs entries on teardown ucsi_register() creates per-instance debugfs entries, but ucsi_unregister() keeps them around until ucsi_destroy(). Drivers like ucsi_glink that unregister/register the same UCSI instance across remoteproc restart then try to create an already existing debugfs directory and log: debugfs: 'pmic_glink.ucsi.0' already exists in 'ucsi' Unregister debugfs entries as part of ucsi_unregister(), and clear ucsi->debugfs after freeing it so repeated unregister paths remain safe.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1f44d001620fd3caa30619a9bc73e9d15555408b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/62efee351566321ad72a4abaf6eb7d972590585d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7177c215e69658adbd2f2fc5b72e14be9208d2ba
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eed73a65ab609b79d53de88cccc34b36dfe753c4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fb7393519908befdc094be4ea913f582adbf2f7c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/ucsi/debugfs.c",
            "drivers/usb/typec/ucsi/ucsi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fb7393519908befdc094be4ea913f582adbf2f7c",
              "status": "affected",
              "version": "df0383ffad64dc09954a60873c1e202b47f08d90",
              "versionType": "git"
            },
            {
              "lessThan": "7177c215e69658adbd2f2fc5b72e14be9208d2ba",
              "status": "affected",
              "version": "df0383ffad64dc09954a60873c1e202b47f08d90",
              "versionType": "git"
            },
            {
              "lessThan": "1f44d001620fd3caa30619a9bc73e9d15555408b",
              "status": "affected",
              "version": "df0383ffad64dc09954a60873c1e202b47f08d90",
              "versionType": "git"
            },
            {
              "lessThan": "62efee351566321ad72a4abaf6eb7d972590585d",
              "status": "affected",
              "version": "df0383ffad64dc09954a60873c1e202b47f08d90",
              "versionType": "git"
            },
            {
              "lessThan": "eed73a65ab609b79d53de88cccc34b36dfe753c4",
              "status": "affected",
              "version": "df0383ffad64dc09954a60873c1e202b47f08d90",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/ucsi/debugfs.c",
            "drivers/usb/typec/ucsi/ucsi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: unregister debugfs entries on teardown\n\nucsi_register() creates per-instance debugfs entries, but\nucsi_unregister() keeps them around until ucsi_destroy().\n\nDrivers like ucsi_glink that unregister/register the same UCSI\ninstance across remoteproc restart then try to create an already\nexisting debugfs directory and log:\n\n  debugfs: \u0027pmic_glink.ucsi.0\u0027 already exists in \u0027ucsi\u0027\n\nUnregister debugfs entries as part of ucsi_unregister(), and\nclear ucsi-\u003edebugfs after freeing it so repeated unregister\npaths remain safe."
    }
  ],
  "id": "CVE-2026-100079",
  "lastModified": "2026-09-25T14:17:15.000",
  "metrics": {},
  "published": "2026-09-25T14:17:15.000",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1f44d001620fd3caa30619a9bc73e9d15555408b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/62efee351566321ad72a4abaf6eb7d972590585d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7177c215e69658adbd2f2fc5b72e14be9208d2ba"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eed73a65ab609b79d53de88cccc34b36dfe753c4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fb7393519908befdc094be4ea913f582adbf2f7c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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