Vulnerability-Lookup

FKIE_CVE-2026-93214

Vulnerability from fkie_nvd - Published: 2026-09-24 16:17 - Updated: 2026-09-24 16:17

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_tcm: fix deadlock in usbg_make_tpg() usbg_make_tpg() held dep_lock while calling configfs_depend_item_unlocked(), which acquires the configfs root inode lock when operating across subsystems. This creates a circular lock dependency with configfs_rmdir(): dep_lock -> configfs root inode lock -> su_mutex -> dep_lock In usbg_make_tpg(), dep_lock only serialized the read of opts->ready, which is a monotonic flag that transitions from false to true exactly once (in tcm_set_name()) and never reverts. Remove dep_lock from usbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access opts->ready locklessly instead.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3639438a4c83ffc2e564c8c010b92137c5d11cfa
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/78a14ea2284825055ab6c2a1f3489510f560f3a2
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9dbf74f4022f80f7669d2b3c22c5deb46c1b5674
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d90b0f90e30cd59b36005a4016b15cf02bcd7fb2
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/eef3e62f90d86c1c5651742f84ecc9db1814a893
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f81a2da137b029a282b9bc64d2f267d242948659

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_tcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "3639438a4c83ffc2e564c8c010b92137c5d11cfa",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "78a14ea2284825055ab6c2a1f3489510f560f3a2",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "eef3e62f90d86c1c5651742f84ecc9db1814a893",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "f81a2da137b029a282b9bc64d2f267d242948659",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "d90b0f90e30cd59b36005a4016b15cf02bcd7fb2",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "9dbf74f4022f80f7669d2b3c22c5deb46c1b5674",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_tcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.5"
            },
            {
              "lessThan": "4.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "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: gadget: f_tcm: fix deadlock in usbg_make_tpg()\n\nusbg_make_tpg() held dep_lock while calling\nconfigfs_depend_item_unlocked(), which acquires the configfs root\ninode lock when operating across subsystems. This creates a circular\nlock dependency with configfs_rmdir():\n\n  dep_lock -\u003e configfs root inode lock -\u003e su_mutex -\u003e dep_lock\n\nIn usbg_make_tpg(), dep_lock only serialized the read of opts-\u003eready,\nwhich is a monotonic flag that transitions from false to true exactly\nonce (in tcm_set_name()) and never reverts. Remove dep_lock from\nusbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access\nopts-\u003eready locklessly instead."
    }
  ],
  "id": "CVE-2026-93214",
  "lastModified": "2026-09-24T16:17:16.397",
  "metrics": {},
  "published": "2026-09-24T16:17:16.397",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3639438a4c83ffc2e564c8c010b92137c5d11cfa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/78a14ea2284825055ab6c2a1f3489510f560f3a2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9dbf74f4022f80f7669d2b3c22c5deb46c1b5674"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d90b0f90e30cd59b36005a4016b15cf02bcd7fb2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eef3e62f90d86c1c5651742f84ecc9db1814a893"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f81a2da137b029a282b9bc64d2f267d242948659"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-93214 (GCVE-0-2026-93214)

Vulnerability from cvelistv5 – Published: 2026-09-24 15:10 – Updated: 2026-09-24 15:10

Title

usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/abad5daa41cf5d0a0…
https://git.kernel.org/stable/c/3639438a4c83ffc2e…
https://git.kernel.org/stable/c/78a14ea2284825055…
https://git.kernel.org/stable/c/eef3e62f90d86c1c5…
https://git.kernel.org/stable/c/f81a2da137b029a28…
https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d…
https://git.kernel.org/stable/c/d90b0f90e30cd59b3…
https://git.kernel.org/stable/c/9dbf74f4022f80f76…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277 (git) Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < 3639438a4c83ffc2e564c8c010b92137c5d11cfa (git) Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < 78a14ea2284825055ab6c2a1f3489510f560f3a2 (git) Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < eef3e62f90d86c1c5651742f84ecc9db1814a893 (git) Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < f81a2da137b029a282b9bc64d2f267d242948659 (git) Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < 6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9 (git) Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < d90b0f90e30cd59b36005a4016b15cf02bcd7fb2 (git) Affected: 4bb8548df632187d5db50878e71804af5f7c51ad , < 9dbf74f4022f80f7669d2b3c22c5deb46c1b5674 (git)
Linux	Linux	Affected: 4.5 Unaffected: 0 , < 4.5 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.109 , ≤ 6.12.* (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_tcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "3639438a4c83ffc2e564c8c010b92137c5d11cfa",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "78a14ea2284825055ab6c2a1f3489510f560f3a2",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "eef3e62f90d86c1c5651742f84ecc9db1814a893",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "f81a2da137b029a282b9bc64d2f267d242948659",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "d90b0f90e30cd59b36005a4016b15cf02bcd7fb2",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            },
            {
              "lessThan": "9dbf74f4022f80f7669d2b3c22c5deb46c1b5674",
              "status": "affected",
              "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_tcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.5"
            },
            {
              "lessThan": "4.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "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": "5.10.270",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_tcm: fix deadlock in usbg_make_tpg()\n\nusbg_make_tpg() held dep_lock while calling\nconfigfs_depend_item_unlocked(), which acquires the configfs root\ninode lock when operating across subsystems. This creates a circular\nlock dependency with configfs_rmdir():\n\n  dep_lock -\u003e configfs root inode lock -\u003e su_mutex -\u003e dep_lock\n\nIn usbg_make_tpg(), dep_lock only serialized the read of opts-\u003eready,\nwhich is a monotonic flag that transitions from false to true exactly\nonce (in tcm_set_name()) and never reverts. Remove dep_lock from\nusbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access\nopts-\u003eready locklessly instead."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-24T15:10:36.975Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277"
        },
        {
          "url": "https://git.kernel.org/stable/c/3639438a4c83ffc2e564c8c010b92137c5d11cfa"
        },
        {
          "url": "https://git.kernel.org/stable/c/78a14ea2284825055ab6c2a1f3489510f560f3a2"
        },
        {
          "url": "https://git.kernel.org/stable/c/eef3e62f90d86c1c5651742f84ecc9db1814a893"
        },
        {
          "url": "https://git.kernel.org/stable/c/f81a2da137b029a282b9bc64d2f267d242948659"
        },
        {
          "url": "https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/d90b0f90e30cd59b36005a4016b15cf02bcd7fb2"
        },
        {
          "url": "https://git.kernel.org/stable/c/9dbf74f4022f80f7669d2b3c22c5deb46c1b5674"
        }
      ],
      "title": "usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93214",
    "datePublished": "2026-09-24T15:10:36.975Z",
    "dateReserved": "2026-09-17T16:02:15.093Z",
    "dateUpdated": "2026-09-24T15:10:36.975Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2026-93214

CVE-2026-93214 (GCVE-0-2026-93214)

Tags

Sightings

Nomenclature

Related by attack behaviour