CVE-2026-89620

{
  "id": "CVE-2026-89620",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-11T20:19:47.280",
  "lastModified": "2026-10-19T09:17:58.767",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: intel-thc-hid: intel-quickspi: validate report size before copy\n\nwrite_cmd_to_txdma() builds an output report in qsdev->report_buf, a heap\nbuffer allocated in quickspi_alloc_report_buf() to the device-descriptor\nderived max_report_len (a few hundred bytes for a touch controller).  It\ncopies the caller-supplied report into that buffer:\n\n    memcpy(write_buf->content, report_buf, report_buf_len);\n\nThe HID core caps a report at HID_MAX_BUFFER_SIZE (16384) by default, and\nquickspi_hid_ll_driver does not set max_buffer_size, so the length reaches\nthe driver unbounded.  A hidraw SET_REPORT/SET_FEATURE ioctl carrying a\nreport larger than max_report_len therefore overflows report_buf with\nattacker-controlled length and content.\n\nRecord the report_buf allocation size and reject reports that do not fit\nbefore copying, matching the equivalent guard in the intel-quicki2c\nsibling (quicki2c_init_write_buf()) and the hid-goodix-spi fix.\n\nwrite_cmd_to_txdma() writes the output report header ahead of the content\nin the same buffer, so size the allocation to cover the header as well.\nThat keeps the added bound from rejecting a maximum-sized report."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c",
            "drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h",
            "drivers/hid/intel-thc-hid/intel-quickspi/quickspi-protocol.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "9d8d51735a3af40b722346931a6a1e50227df4b5",
              "lessThan": "6fcefe71aeb524f6e77fe586fe85d873745e917c",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "9d8d51735a3af40b722346931a6a1e50227df4b5",
              "lessThan": "ee8ad1bb1e96164d51089b1182f1bd5f187e7baa",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "9d8d51735a3af40b722346931a6a1e50227df4b5",
              "lessThan": "a59cf84441f9a17323c89452cec2bf16724c48a9",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c",
            "drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h",
            "drivers/hid/intel-thc-hid/intel-quickspi/quickspi-protocol.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.14",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.14",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.50",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.4",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/6fcefe71aeb524f6e77fe586fe85d873745e917c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a59cf84441f9a17323c89452cec2bf16724c48a9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ee8ad1bb1e96164d51089b1182f1bd5f187e7baa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}