Vulnerability-Lookup

FKIE_CVE-2026-64346

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-09-03 16:04

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: udc: Fix use-after-free in gadget_match_driver The udc structure acts as the management structure for the gadget, but their lifecycles are decoupled. A race condition exists where usb_del_gadget() frees the udc memory (e.g., via mode-switch work) while gadget_match_driver() concurrently accesses the freed udc memory (e.g., via configfs), causing a Use-After-Free (UAF) that triggers a NULL pointer dereference when the freed memory is zeroed: [39430.908615][ T1171] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [39430.911397][ T1171] pc : __pi_strcmp+0x20/0x140 [39430.911441][ T1171] lr : gadget_match_driver+0x34/0x60 ... [39430.911890][ T1171] usb_gadget_register_driver_owner+0x50/0xf8 [39430.911910][ T1171] gadget_dev_desc_UDC_store+0xf4/0x140 [39430.931308][ T1171] configfs_write_iter+0xec/0x134 [39430.957058][ T1171] Workqueue: events_freezable __dwc3_set_mode [39430.957287][ T1171] dwc3_gadget_exit+0x34/0x8c [39430.957304][ T1171] __dwc3_set_mode+0xc0/0x664 Fix this by ensuring the udc structure remains allocated until the gadget is released. To achieve this, introduce a new usb_gadget_release() routine to the core. When the gadget is added, usb_add_gadget() stores the gadget's release routine in the udc structure and takes a reference to the udc. When the gadget is released, usb_gadget_release() drops the reference to the udc and then calls the gadget's release routine.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/50eeb8e8a4f389efc91b93cff14a683e714ec194	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/54fa390aae393eb130f307a85562e3001cc39a52	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7a5214dae906d9f58e07bc4995e8181ee74439f4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b52476a83d9e12df00765359d728a875b128bef1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d026f71df141c9b064ff32a78af5391a31ef75c2	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.2
linux	linux_kernel	7.2

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/udc/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
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              "status": "affected",
              "version": "fc274c1e997314bf47f6a62c79b5d7e554ed59c4",
              "versionType": "git"
            },
            {
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              "status": "affected",
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            },
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            },
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              "versionType": "git"
            }
          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "5.19"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
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              "vulnerable": true
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          "negate": false,
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        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: udc: Fix use-after-free in gadget_match_driver\n\nThe udc structure acts as the management structure for the gadget,\nbut their lifecycles are decoupled. A race condition exists where\nusb_del_gadget() frees the udc memory (e.g., via mode-switch work)\nwhile gadget_match_driver() concurrently accesses the freed udc memory\n(e.g., via configfs), causing a Use-After-Free (UAF) that triggers a\nNULL pointer dereference when the freed memory is zeroed:\n\n[39430.908615][ T1171] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[39430.911397][ T1171] pc : __pi_strcmp+0x20/0x140\n[39430.911441][ T1171] lr : gadget_match_driver+0x34/0x60\n...\n[39430.911890][ T1171]  usb_gadget_register_driver_owner+0x50/0xf8\n[39430.911910][ T1171]  gadget_dev_desc_UDC_store+0xf4/0x140\n[39430.931308][ T1171]  configfs_write_iter+0xec/0x134\n\n[39430.957058][ T1171] Workqueue: events_freezable __dwc3_set_mode\n[39430.957287][ T1171]  dwc3_gadget_exit+0x34/0x8c\n[39430.957304][ T1171]  __dwc3_set_mode+0xc0/0x664\n\nFix this by ensuring the udc structure remains allocated until the\ngadget is released. To achieve this, introduce a new\nusb_gadget_release() routine to the core. When the gadget is added,\nusb_add_gadget() stores the gadget\u0027s release routine in the udc\nstructure and takes a reference to the udc. When the gadget is\nreleased, usb_gadget_release() drops the reference to the udc and\nthen calls the gadget\u0027s release routine."
    }
  ],
  "id": "CVE-2026-64346",
  "lastModified": "2026-09-03T16:04:10.017",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-07-25T10:17:16.757",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/50eeb8e8a4f389efc91b93cff14a683e714ec194"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/54fa390aae393eb130f307a85562e3001cc39a52"
    },
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    },
    {
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      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b52476a83d9e12df00765359d728a875b128bef1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d026f71df141c9b064ff32a78af5391a31ef75c2"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-64346 (GCVE-0-2026-64346)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-08-17 04:53

Title

usb: gadget: udc: Fix use-after-free in gadget_match_driver

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/50eeb8e8a4f389efc…
https://git.kernel.org/stable/c/7a5214dae906d9f58…
https://git.kernel.org/stable/c/d026f71df141c9b06…
https://git.kernel.org/stable/c/b52476a83d9e12df0…
https://git.kernel.org/stable/c/54fa390aae393eb13…
https://git.kernel.org/stable/c/67e511d2989eb1c8c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: fc274c1e997314bf47f6a62c79b5d7e554ed59c4 , < 50eeb8e8a4f389efc91b93cff14a683e714ec194 (git) Affected: fc274c1e997314bf47f6a62c79b5d7e554ed59c4 , < 7a5214dae906d9f58e07bc4995e8181ee74439f4 (git) Affected: fc274c1e997314bf47f6a62c79b5d7e554ed59c4 , < d026f71df141c9b064ff32a78af5391a31ef75c2 (git) Affected: fc274c1e997314bf47f6a62c79b5d7e554ed59c4 , < b52476a83d9e12df00765359d728a875b128bef1 (git) Affected: fc274c1e997314bf47f6a62c79b5d7e554ed59c4 , < 54fa390aae393eb130f307a85562e3001cc39a52 (git) Affected: fc274c1e997314bf47f6a62c79b5d7e554ed59c4 , < 67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea (git)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/udc/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "50eeb8e8a4f389efc91b93cff14a683e714ec194",
              "status": "affected",
              "version": "fc274c1e997314bf47f6a62c79b5d7e554ed59c4",
              "versionType": "git"
            },
            {
              "lessThan": "7a5214dae906d9f58e07bc4995e8181ee74439f4",
              "status": "affected",
              "version": "fc274c1e997314bf47f6a62c79b5d7e554ed59c4",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "fc274c1e997314bf47f6a62c79b5d7e554ed59c4",
              "versionType": "git"
            },
            {
              "lessThan": "54fa390aae393eb130f307a85562e3001cc39a52",
              "status": "affected",
              "version": "fc274c1e997314bf47f6a62c79b5d7e554ed59c4",
              "versionType": "git"
            },
            {
              "lessThan": "67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea",
              "status": "affected",
              "version": "fc274c1e997314bf47f6a62c79b5d7e554ed59c4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/udc/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.19"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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                },
                {
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                },
                {
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: udc: Fix use-after-free in gadget_match_driver\n\nThe udc structure acts as the management structure for the gadget,\nbut their lifecycles are decoupled. A race condition exists where\nusb_del_gadget() frees the udc memory (e.g., via mode-switch work)\nwhile gadget_match_driver() concurrently accesses the freed udc memory\n(e.g., via configfs), causing a Use-After-Free (UAF) that triggers a\nNULL pointer dereference when the freed memory is zeroed:\n\n[39430.908615][ T1171] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[39430.911397][ T1171] pc : __pi_strcmp+0x20/0x140\n[39430.911441][ T1171] lr : gadget_match_driver+0x34/0x60\n...\n[39430.911890][ T1171]  usb_gadget_register_driver_owner+0x50/0xf8\n[39430.911910][ T1171]  gadget_dev_desc_UDC_store+0xf4/0x140\n[39430.931308][ T1171]  configfs_write_iter+0xec/0x134\n\n[39430.957058][ T1171] Workqueue: events_freezable __dwc3_set_mode\n[39430.957287][ T1171]  dwc3_gadget_exit+0x34/0x8c\n[39430.957304][ T1171]  __dwc3_set_mode+0xc0/0x664\n\nFix this by ensuring the udc structure remains allocated until the\ngadget is released. To achieve this, introduce a new\nusb_gadget_release() routine to the core. When the gadget is added,\nusb_add_gadget() stores the gadget\u0027s release routine in the udc\nstructure and takes a reference to the udc. When the gadget is\nreleased, usb_gadget_release() drops the reference to the udc and\nthen calls the gadget\u0027s release routine."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:53:51.249Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/50eeb8e8a4f389efc91b93cff14a683e714ec194"
        },
        {
          "url": "https://git.kernel.org/stable/c/7a5214dae906d9f58e07bc4995e8181ee74439f4"
        },
        {
          "url": "https://git.kernel.org/stable/c/d026f71df141c9b064ff32a78af5391a31ef75c2"
        },
        {
          "url": "https://git.kernel.org/stable/c/b52476a83d9e12df00765359d728a875b128bef1"
        },
        {
          "url": "https://git.kernel.org/stable/c/54fa390aae393eb130f307a85562e3001cc39a52"
        },
        {
          "url": "https://git.kernel.org/stable/c/67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea"
        }
      ],
      "title": "usb: gadget: udc: Fix use-after-free in gadget_match_driver",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64346",
    "datePublished": "2026-07-25T08:50:07.680Z",
    "dateReserved": "2026-07-19T15:36:31.782Z",
    "dateUpdated": "2026-08-17T04:53:51.249Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

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.