CVE-2026-98860 (GCVE-0-2026-98860)
Vulnerability from cvelistv5
Published
2026-10-18 15:51
Modified
2026-10-19 09:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: bpf: cast size to ssize_t when checking hid_bpf_hw_request As reported by Sashiko: If a transport driver encounters a hardware error and returns a negative error code such as -EPIPE, ret is implicitly promoted to size_t when compared against size. This causes the negative error code to evaluate as a large positive number, making the (ret > size) condition true. This silently converts the hardware error into a success return value and copies the unmodified buffer back, which could leave BPF programs operating on uninitialized or stale data. Fix this by casting size into ssize_t to return the actual negative error code.
References
Impacted products
Vendor Product Version
Linux Linux Version: d6efaa50af62fb0790dd1fd4e7e5506b46312510
Version: 73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1
Version: 2b658c1c442ec1cd9eec5ead98d68662c40fe645
Version: 2b658c1c442ec1cd9eec5ead98d68662c40fe645
Version: eb57dae20fdf6f3069cdc07821fa3bb46de381d7
Version: 6.12.78   ≤
Version: 6.18.20   ≤
Version: 6.19.10   ≤
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{
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: bpf: cast size to ssize_t when checking hid_bpf_hw_request\n\nAs reported by Sashiko:\nIf a transport driver encounters a hardware error and returns a negative\nerror code such as -EPIPE, ret is implicitly promoted to size_t when\ncompared against size. This causes the negative error code to evaluate\nas a large positive number, making the (ret \u003e size) condition true.\n\nThis silently converts the hardware error into a success return value\nand copies the unmodified buffer back, which could leave BPF programs\noperating on uninitialized or stale data.\n\nFix this by casting size into ssize_t to return the actual negative\nerror code."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:26:54.770Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8b85ef0f561039e249c3f883c5280a1449c6dbee"
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          "url": "https://git.kernel.org/stable/c/97be6396817bd3b11d06239010d27902940bfaa9"
        },
        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c"
        }
      ],
      "title": "HID: bpf: cast size to ssize_t when checking hid_bpf_hw_request",
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98860",
    "datePublished": "2026-10-18T15:51:21.403Z",
    "dateReserved": "2026-09-25T10:25:14.376Z",
    "dateUpdated": "2026-10-19T09:26:54.770Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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