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

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-06-14 17:42
VLAI
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: cb382536052fcc7713988869b54a81137069e5a9 , < c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43 (git)
Affected: cb382536052fcc7713988869b54a81137069e5a9 , < eb6ef6185f2054a341ec70d7e2165f5381744215 (git)
Affected: cb382536052fcc7713988869b54a81137069e5a9 , < 5a229016ca3ac551294ec59770be9da94ec4bf63 (git)
Affected: cb382536052fcc7713988869b54a81137069e5a9 , < 75ecc46828ec377dd5692c677168ef6d64fd7123 (git)
Affected: cb382536052fcc7713988869b54a81137069e5a9 , < 81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d (git)
guessed Create a notification for this product.
Linux 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)
Unaffected: 7.1 , ≤ * (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/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"
            },
            {
              "lessThan": "5a229016ca3ac551294ec59770be9da94ec4bf63",
              "status": "affected",
              "version": "cb382536052fcc7713988869b54a81137069e5a9",
              "versionType": "git"
            },
            {
              "lessThan": "75ecc46828ec377dd5692c677168ef6d64fd7123",
              "status": "affected",
              "version": "cb382536052fcc7713988869b54a81137069e5a9",
              "versionType": "git"
            },
            {
              "lessThan": "81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d",
              "status": "affected",
              "version": "cb382536052fcc7713988869b54a81137069e5a9",
              "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"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "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
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "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": "2026-06-14T17:42:47.071Z",
        "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"
        },
        {
          "url": "https://git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d"
        }
      ],
      "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": "2026-06-14T17:42:47.071Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-31606",
      "date": "2026-10-01",
      "epss": "0.00162",
      "percentile": "0.04721"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-25T02:26:35.000Z",
      "cve": "CVE-2026-31606",
      "id": "msrc_CVE-2026-31606",
      "initial_release_date": "2026-04-26T01:01:42.000Z",
      "product_status:known_affected": "6",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "usb: gadget: f_hid: don\u0027t call cdev_init while cdev in use",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-31606.json",
      "version": "9"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "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"
                  },
                  {
                    "lessThan": "5a229016ca3ac551294ec59770be9da94ec4bf63",
                    "status": "affected",
                    "version": "cb382536052fcc7713988869b54a81137069e5a9",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "75ecc46828ec377dd5692c677168ef6d64fd7123",
                    "status": "affected",
                    "version": "cb382536052fcc7713988869b54a81137069e5a9",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d",
                    "status": "affected",
                    "version": "cb382536052fcc7713988869b54a81137069e5a9",
                    "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"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.1",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "3CD4A015-C9CA-48DA-A0F8-0A35B8A34560",
                    "versionEndExcluding": "6.12.83",
                    "versionStartIncluding": "3.19",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "8126B8B8-6D0B-4443-86C1-672AEE893555",
                    "versionEndExcluding": "6.18.24",
                    "versionStartIncluding": "6.13",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D6A8A074-BBF4-4803-ABED-519A839435BB",
                    "versionEndExcluding": "6.19.14",
                    "versionStartIncluding": "6.19",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "9B5888AB-7403-4335-89E4-21CC0B48366A",
                    "versionEndExcluding": "7.0.1",
                    "versionStartIncluding": "7.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "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": "2026-06-17T10:34:04.593",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-04-24T15:16:39.830",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T12:00:46+00:00",
      "cve": "CVE-2026-31606",
      "id": "CVE-2026-31606",
      "initial_release_date": "2026-04-24T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: gadget: f_hid: don\u0027t call cdev_init while cdev in use",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31606.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-01T01:31:15Z",
      "cve": "CVE-2026-31606",
      "id": "CVE-2026-31606",
      "initial_release_date": "2026-04-25T01:38:10Z",
      "product_status:known_affected": "390",
      "product_status:known_not_affected": "21",
      "product_status:recommended": "149",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-31606",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-31606.json",
      "version": "8"
    }
  }
}



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.