HID: bpf: prevent buffer overflow in hid_hw_request

{
  "id": "0dff345ff7ad177a0e9759a56c6bc988dc8415a2c9c3f73ade1de7c480a40911",
  "url": "https://osv.dev/vulnerability/CVE-2026-31401",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "HID: bpf: prevent buffer overflow in hid_hw_request",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: HID: bpf: prevent buffer overflow in hid_hw_request right now the returned value is considered to be always valid. However, when playing with HID-BPF, the return value can be arbitrary big, because it's the return value of dispatch_hid_bpf_raw_requests(), which calls the struct_ops and we have no guarantees that the value makes sense.",
    "evidence": "osv:CVE-2026-31401",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.78",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.20",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-31401",
      "aliases": [
        "CVE-2026-31401"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
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                {
                  "fixed": "73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1"
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                {
                  "fixed": "eb57dae20fdf6f3069cdc07821fa3bb46de381d7"
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                {
                  "fixed": "2b658c1c442ec1cd9eec5ead98d68662c40fe645"
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              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31401.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.11.0"
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                {
                  "fixed": "6.12.78"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.20"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.10"
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31401.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.536307658Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2b658c1c442ec1cd9eec5ead98d68662c40fe645",
        "https://git.kernel.org/stable/c/73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1",
        "https://git.kernel.org/stable/c/d6efaa50af62fb0790dd1fd4e7e5506b46312510",
        "https://git.kernel.org/stable/c/eb57dae20fdf6f3069cdc07821fa3bb46de381d7",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31401.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-31401",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31401.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-31401",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 502979,
  "published_at": "2026-04-03T15:16:04.903+00:00"
}