Vulnerability-Lookup

CVE-2026-31606 (GCVE-0-2026-31606)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-04-25 05:48

Title

usb: gadget: f_hid: don't call cdev_init while cdev in use

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: don't call cdev_init while cdev in use When calling unbind, then bind again, cdev_init reinitialized the cdev, even though there may still be references to it. That's the case when the /dev/hidg* device is still opened. This obviously unsafe behavior like oopes. This fixes this by using cdev_alloc to put the cdev on the heap. That way, we can simply allocate a new one in hidg_bind.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/c6c0d13db5d0f8d46…
	https://git.kernel.org/stable/c/eb6ef6185f2054a34…
	https://git.kernel.org/stable/c/5a229016ca3ac5512…
	https://git.kernel.org/stable/c/75ecc46828ec377dd…

Impacted products

Vendor

Product

Version

Linux

Affected: cb382536052fcc7713988869b54a81137069e5a9 , < c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43 (git)
Affected: cb382536052fcc7713988869b54a81137069e5a9 , < eb6ef6185f2054a341ec70d7e2165f5381744215 (git)
Affected: cb382536052fcc7713988869b54a81137069e5a9 , < 5a229016ca3ac551294ec59770be9da94ec4bf63 (git)
Affected: cb382536052fcc7713988869b54a81137069e5a9 , < 75ecc46828ec377dd5692c677168ef6d64fd7123 (git)

Linux

Affected: 3.19
Unaffected: 0 , < 3.19 (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0.1 , ≤ 7.0.* (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_hid.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43",
              "status": "affected",
              "version": "cb382536052fcc7713988869b54a81137069e5a9",
              "versionType": "git"
            },
            {
              "lessThan": "eb6ef6185f2054a341ec70d7e2165f5381744215",
              "status": "affected",
              "version": "cb382536052fcc7713988869b54a81137069e5a9",
              "versionType": "git"
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              "lessThan": "5a229016ca3ac551294ec59770be9da94ec4bf63",
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              "versionType": "git"
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_hid.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.19"
            },
            {
              "lessThan": "3.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.83",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.24",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.14",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.1",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_hid: don\u0027t call cdev_init while cdev in use\n\nWhen calling unbind, then bind again, cdev_init reinitialized the cdev,\neven though there may still be references to it. That\u0027s the case when\nthe /dev/hidg* device is still opened. This obviously unsafe behavior\nlike oopes.\n\nThis fixes this by using cdev_alloc to put the cdev on the heap. That\nway, we can simply allocate a new one in hidg_bind."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-25T05:48:16.073Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63"
        },
        {
          "url": "https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123"
        }
      ],
      "title": "usb: gadget: f_hid: don\u0027t call cdev_init while cdev in use",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31606",
    "datePublished": "2026-04-24T14:42:28.792Z",
    "dateReserved": "2026-03-09T15:48:24.122Z",
    "dateUpdated": "2026-04-25T05:48:16.073Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-31606",
      "date": "2026-04-25",
      "epss": "0.00018",
      "percentile": "0.04621"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31606\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-24T15:16:39.830\",\"lastModified\":\"2026-04-24T17:51:40.810\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: gadget: f_hid: don\u0027t call cdev_init while cdev in use\\n\\nWhen calling unbind, then bind again, cdev_init reinitialized the cdev,\\neven though there may still be references to it. That\u0027s the case when\\nthe /dev/hidg* device is still opened. This obviously unsafe behavior\\nlike oopes.\\n\\nThis fixes this by using cdev_alloc to put the cdev on the heap. That\\nway, we can simply allocate a new one in hidg_bind.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

GHSA-48XP-R2J8-CFX4

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-04-24 15:32

Details

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

usb: gadget: f_hid: don't call cdev_init while cdev in use

When calling unbind, then bind again, cdev_init reinitialized the cdev, even though there may still be references to it. That's the case when the /dev/hidg* device is still opened. This obviously unsafe behavior like oopes.

This fixes this by using cdev_alloc to put the cdev on the heap. That way, we can simply allocate a new one in hidg_bind.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-31606"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-24T15:16:39Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_hid: don\u0027t call cdev_init while cdev in use\n\nWhen calling unbind, then bind again, cdev_init reinitialized the cdev,\neven though there may still be references to it. That\u0027s the case when\nthe /dev/hidg* device is still opened. This obviously unsafe behavior\nlike oopes.\n\nThis fixes this by using cdev_alloc to put the cdev on the heap. That\nway, we can simply allocate a new one in hidg_bind.",
  "id": "GHSA-48xp-r2j8-cfx4",
  "modified": "2026-04-24T15:32:35Z",
  "published": "2026-04-24T15:32:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31606"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

FKIE_CVE-2026-31606

Vulnerability from fkie_nvd - Published: 2026-04-24 15:16 - Updated: 2026-04-24 17:51

Severity ?

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_hid: don\u0027t call cdev_init while cdev in use\n\nWhen calling unbind, then bind again, cdev_init reinitialized the cdev,\neven though there may still be references to it. That\u0027s the case when\nthe /dev/hidg* device is still opened. This obviously unsafe behavior\nlike oopes.\n\nThis fixes this by using cdev_alloc to put the cdev on the heap. That\nway, we can simply allocate a new one in hidg_bind."
    }
  ],
  "id": "CVE-2026-31606",
  "lastModified": "2026-04-24T17:51:40.810",
  "metrics": {},
  "published": "2026-04-24T15:16:39.830",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

MSRC_CVE-2026-31606

Vulnerability from csaf_microsoft - Published: 2026-04-02 00:00 - Updated: 2026-04-26 01:01

Summary

usb: gadget: f_hid: don't call cdev_init while cdev in use

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-31606

References

URL

Category

	https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
	https://support.microsoft.com/lifecycle	external
	https://www.first.org/cvss	external
	https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-31606 usb: gadget: f_hid: don\u0027t call cdev_init while cdev in use - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-31606.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "usb: gadget: f_hid: don\u0027t call cdev_init while cdev in use",
    "tracking": {
      "current_release_date": "2026-04-26T01:01:42.000Z",
      "generator": {
        "date": "2026-04-26T07:27:57.343Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-31606",
      "initial_release_date": "2026-04-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-04-26T01:01:42.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-31606",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "under_investigation": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-31606 usb: gadget: f_hid: don\u0027t call cdev_init while cdev in use - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-31606.json"
        }
      ],
      "title": "usb: gadget: f_hid: don\u0027t call cdev_init while cdev in use"
    }
  ]
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CVE-2026-31606 (GCVE-0-2026-31606)

GHSA-48XP-R2J8-CFX4

FKIE_CVE-2026-31606

MSRC_CVE-2026-31606

Tags

Sightings

Nomenclature