CVE-2026-100079 (GCVE-0-2026-100079)

Vulnerability from cvelistv5 – Published: 2026-09-25 13:06 – Updated: 2026-09-25 13:06
VLAI
Title
usb: typec: ucsi: unregister debugfs entries on teardown
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: df0383ffad64dc09954a60873c1e202b47f08d90 , < fb7393519908befdc094be4ea913f582adbf2f7c (git)
Affected: df0383ffad64dc09954a60873c1e202b47f08d90 , < 7177c215e69658adbd2f2fc5b72e14be9208d2ba (git)
Affected: df0383ffad64dc09954a60873c1e202b47f08d90 , < 1f44d001620fd3caa30619a9bc73e9d15555408b (git)
Affected: df0383ffad64dc09954a60873c1e202b47f08d90 , < 62efee351566321ad72a4abaf6eb7d972590585d (git)
Affected: df0383ffad64dc09954a60873c1e202b47f08d90 , < eed73a65ab609b79d53de88cccc34b36dfe753c4 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T13:06:49.915Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fb7393519908befdc094be4ea913f582adbf2f7c"
        },
        {
          "url": "https://git.kernel.org/stable/c/7177c215e69658adbd2f2fc5b72e14be9208d2ba"
        },
        {
          "url": "https://git.kernel.org/stable/c/1f44d001620fd3caa30619a9bc73e9d15555408b"
        },
        {
          "url": "https://git.kernel.org/stable/c/62efee351566321ad72a4abaf6eb7d972590585d"
        },
        {
          "url": "https://git.kernel.org/stable/c/eed73a65ab609b79d53de88cccc34b36dfe753c4"
        }
      ],
      "title": "usb: typec: ucsi: unregister debugfs entries on teardown",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-100079",
    "datePublished": "2026-09-25T13:06:49.915Z",
    "dateReserved": "2026-09-25T10:25:14.456Z",
    "dateUpdated": "2026-09-25T13:06:49.915Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-100079",
      "date": "2026-09-29",
      "epss": "0.00156",
      "percentile": "0.04097"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-28T00:40:58.000Z",
      "cve": "CVE-2026-100079",
      "id": "msrc_CVE-2026-100079",
      "initial_release_date": "2026-09-27T23:48:16.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "usb: typec: ucsi: unregister debugfs entries on teardown",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-100079.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "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"
      }
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-28T23:41:10Z",
      "cve": "CVE-2026-100079",
      "id": "CVE-2026-100079",
      "initial_release_date": "2026-09-28T23:41:10Z",
      "product_status:known_affected": "30",
      "product_status:known_not_affected": "317",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-100079",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-100079.json",
      "version": "2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • 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.