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GHSA-5R2J-H2G4-5H5V

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-11 21:31

Details

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

HID: sensor: custom: Fix field sysfs group cleanup on failure

hid_sensor_custom_add_attributes() creates one sysfs group for each custom sensor field. If sysfs_create_group() fails after some groups have already been created, the function returns the error without removing the previously created groups.

Add a local unwind path to remove the groups that were already created. With enable_sensor exposed only after the field attributes are ready, this path can free sensor_inst->fields without leaving enable_sensor able to access pointers into that array.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89626"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:19:48Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: sensor: custom: Fix field sysfs group cleanup on failure\n\nhid_sensor_custom_add_attributes() creates one sysfs group for each\ncustom sensor field. If sysfs_create_group() fails after some groups\nhave already been created, the function returns the error without\nremoving the previously created groups.\n\nAdd a local unwind path to remove the groups that were already created.\nWith enable_sensor exposed only after the field attributes are ready,\nthis path can free sensor_inst-\u003efields without leaving enable_sensor\nable to access pointers into that array.",
  "id": "GHSA-5r2j-h2g4-5h5v",
  "modified": "2026-09-11T21:31:34Z",
  "published": "2026-09-11T21:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89626"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3789d0802ddb4b3be04062caf4bfadd23496e9a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79154fad98ee843e5363940841e2d831503c190a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d96f8958d4469ac02d9c563686cdd968005b944d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3f37b937a6ea2a00fb5e6189e74f855caa43eb5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-89626 (GCVE-0-2026-89626)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:45 – Updated: 2026-09-13 06:32

Title

HID: sensor: custom: Fix field sysfs group cleanup on failure

Summary

In the Linux kernel, the following vulnerability has been resolved: HID: sensor: custom: Fix field sysfs group cleanup on failure hid_sensor_custom_add_attributes() creates one sysfs group for each custom sensor field. If sysfs_create_group() fails after some groups have already been created, the function returns the error without removing the previously created groups. Add a local unwind path to remove the groups that were already created. With enable_sensor exposed only after the field attributes are ready, this path can free sensor_inst->fields without leaving enable_sensor able to access pointers into that array.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/79154fad98ee843e5…
https://git.kernel.org/stable/c/f3f37b937a6ea2a00…
https://git.kernel.org/stable/c/d96f8958d4469ac02…
https://git.kernel.org/stable/c/3789d0802ddb4b3be…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4a7de0519df5e8fb89cef6ee062330ffe4b50a4d , < 79154fad98ee843e5363940841e2d831503c190a (git) Affected: 4a7de0519df5e8fb89cef6ee062330ffe4b50a4d , < f3f37b937a6ea2a00fb5e6189e74f855caa43eb5 (git) Affected: 4a7de0519df5e8fb89cef6ee062330ffe4b50a4d , < d96f8958d4469ac02d9c563686cdd968005b944d (git) Affected: 4a7de0519df5e8fb89cef6ee062330ffe4b50a4d , < 3789d0802ddb4b3be04062caf4bfadd23496e9a7 (git)
Linux	Linux	Affected: 4.1 Unaffected: 0 , < 4.1 (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)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-sensor-custom.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "79154fad98ee843e5363940841e2d831503c190a",
              "status": "affected",
              "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d",
              "versionType": "git"
            },
            {
              "lessThan": "f3f37b937a6ea2a00fb5e6189e74f855caa43eb5",
              "status": "affected",
              "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d",
              "versionType": "git"
            },
            {
              "lessThan": "d96f8958d4469ac02d9c563686cdd968005b944d",
              "status": "affected",
              "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "4a7de0519df5e8fb89cef6ee062330ffe4b50a4d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-sensor-custom.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.1"
            },
            {
              "lessThan": "4.1",
              "status": "unaffected",
              "version": "0",
              "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": "6.12.109",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: sensor: custom: Fix field sysfs group cleanup on failure\n\nhid_sensor_custom_add_attributes() creates one sysfs group for each\ncustom sensor field. If sysfs_create_group() fails after some groups\nhave already been created, the function returns the error without\nremoving the previously created groups.\n\nAdd a local unwind path to remove the groups that were already created.\nWith enable_sensor exposed only after the field attributes are ready,\nthis path can free sensor_inst-\u003efields without leaving enable_sensor\nable to access pointers into that array."
        }
      ],
      "metrics": [
        {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - hid-sensor-hub matches HID_BUS_ANY HID_GROUP_SENSOR_HUB devices and instantiates HID-SENSOR-2000e1/2000e2, so a Bluetooth HID/HoGP peer in radio range can supply a crafted custom-sensor descriptor that probes hid-sensor-custom; USB attach is only a lower-severity physical path.\nAC:L - Duplicate feature/input field group names in the attacker-controlled HID descriptor make sysfs_create_group() fail with -EEXIST after earlier groups are installed, so the missing unwind runs deterministically with no attacker-uncontrollable race or memory layout.\nPR:N - hid_sensor_custom_probe() runs from HID/MFD enumeration when the Bluetooth or USB sensor-hub connects and needs no local account, capability, or userspace authorization.\nUI:N - Probe and sysfs group creation run automatically on HID connect; leftover field attributes are then hit by udev and ordinary sysfs reads with no separate victim mount or file-open action.\nS:U - The leftover sysfs groups and use-after-free of probe-allocated hid_sensor_custom state remain in the host kernel and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - Failed probe leaves field sysfs groups in place while really_probe() device_unbind_cleanup() frees the devm hid_sensor_custom object, so in-progress or later show_value() is a slab use-after-free enabling arbitrary kernel read.\nI:H - The same dangling sysfs show/store path runs against freed hid_sensor_custom state (fields, mutex, hid-sensor-hub pointers), a heap UAF that can be sprayed for arbitrary write and control-flow hijack.\nA:H - Accessing leftover field attributes after probe failure NULL-dereferences cleared drvdata or uses freed sensor_inst, causing kernel oops/panic; any UAF is High availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-13T06:32:07.327Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
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          "url": "https://git.kernel.org/stable/c/f3f37b937a6ea2a00fb5e6189e74f855caa43eb5"
        },
        {
          "url": "https://git.kernel.org/stable/c/d96f8958d4469ac02d9c563686cdd968005b944d"
        },
        {
          "url": "https://git.kernel.org/stable/c/3789d0802ddb4b3be04062caf4bfadd23496e9a7"
        }
      ],
      "title": "HID: sensor: custom: Fix field sysfs group cleanup on failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89626",
    "datePublished": "2026-09-11T19:45:22.769Z",
    "dateReserved": "2026-09-11T19:38:34.737Z",
    "dateUpdated": "2026-09-13T06:32:07.327Z",
    "state": "PUBLISHED"
  },
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  "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.

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GHSA-5R2J-H2G4-5H5V

CVE-2026-89626 (GCVE-0-2026-89626)

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