FKIE_CVE-2026-98499

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-24 14:16
Severity
8.1 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: wacom: fix OOB read in wacom_wac_pen_serial_enforce() The 'wacom_wac_pen_serial_enforce()' function may calculate and pass an invalid offset to hid_field_extract(), resulting in memory reads at incorrect addresses -- possibly beyond the end of the report. If a field in the HID descriptor lists more usages than its Report Count actually reserves space for, the function's inner 'j' will walk past the end of the field: for (i = 0; i < report->maxfield; i++) { for (j = 0; j < report->field[i]->maxusage; j++) { ... value = hid_field_extract(hdev, raw_data + 1, offset + j * size, size); A descriptor listing 12288 usages against Report Count 1 has the loop extract the usage at index 12287 from bit offset 98296 -- about 12 KB past a 2-byte received report. The value is stored in wacom_wac->serial[0] and can reach userspace as an MSC_SERIAL event, making this an information disclosure. Clamp the loop to field->report_count, the number of value slots the report holds. Value slots past the last declared usage are still scanned; they reuse that usage (HID 1.11, 6.2.2.8). Verified on v6.12.105 with a UHID reproducer: a 2-byte report from such a descriptor trips KASAN before the patch and not after it.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26471d954bbfbfb9032994f7f485802ee20e0582
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/456afe4707e23cc114ad833197f63b52bb8fd1e7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4b09b7c84b8633cd041181616bd15bf5e73c164d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/65e7c4b5366b770c60dfefac3f1d06e33a9e411e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9aa237cf66495b2426ddde8532e9b08a0ed83aaa
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3129e6f26e18c0886ede7265f187a7ec289e1d1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eaa7d29341ef4b91e84ad097562982288a7c376c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/wacom_sys.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51",
              "status": "affected",
              "version": "83417206427bdf0fef9fa69957807194f25923c3",
              "versionType": "git"
            },
            {
              "lessThan": "26471d954bbfbfb9032994f7f485802ee20e0582",
              "status": "affected",
              "version": "83417206427bdf0fef9fa69957807194f25923c3",
              "versionType": "git"
            },
            {
              "lessThan": "456afe4707e23cc114ad833197f63b52bb8fd1e7",
              "status": "affected",
              "version": "83417206427bdf0fef9fa69957807194f25923c3",
              "versionType": "git"
            },
            {
              "lessThan": "65e7c4b5366b770c60dfefac3f1d06e33a9e411e",
              "status": "affected",
              "version": "83417206427bdf0fef9fa69957807194f25923c3",
              "versionType": "git"
            },
            {
              "lessThan": "eaa7d29341ef4b91e84ad097562982288a7c376c",
              "status": "affected",
              "version": "83417206427bdf0fef9fa69957807194f25923c3",
              "versionType": "git"
            },
            {
              "lessThan": "c3129e6f26e18c0886ede7265f187a7ec289e1d1",
              "status": "affected",
              "version": "83417206427bdf0fef9fa69957807194f25923c3",
              "versionType": "git"
            },
            {
              "lessThan": "4b09b7c84b8633cd041181616bd15bf5e73c164d",
              "status": "affected",
              "version": "83417206427bdf0fef9fa69957807194f25923c3",
              "versionType": "git"
            },
            {
              "lessThan": "9aa237cf66495b2426ddde8532e9b08a0ed83aaa",
              "status": "affected",
              "version": "83417206427bdf0fef9fa69957807194f25923c3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/wacom_sys.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.16"
            },
            {
              "lessThan": "4.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: wacom: fix OOB read in wacom_wac_pen_serial_enforce()\n\nThe \u0027wacom_wac_pen_serial_enforce()\u0027 function may calculate and pass an\ninvalid offset to hid_field_extract(), resulting in memory reads at\nincorrect addresses -- possibly beyond the end of the report.  If a\nfield in the HID descriptor lists more usages than its Report Count\nactually reserves space for, the function\u0027s inner \u0027j\u0027 will walk past\nthe end of the field:\n\n\tfor (i = 0; i \u003c report-\u003emaxfield; i++) {\n\t\tfor (j = 0; j \u003c report-\u003efield[i]-\u003emaxusage; j++) {\n\t\t\t...\n\t\t\tvalue = hid_field_extract(hdev, raw_data + 1,\n\t\t\t\t\t\t  offset + j * size, size);\n\nA descriptor listing 12288 usages against Report Count 1 has the loop\nextract the usage at index 12287 from bit offset 98296 -- about 12 KB\npast a 2-byte received report.  The value is stored in\nwacom_wac-\u003eserial[0] and can reach userspace as an MSC_SERIAL event,\nmaking this an information disclosure.\n\nClamp the loop to field-\u003ereport_count, the number of value slots the\nreport holds.  Value slots past the last declared usage are still\nscanned; they reuse that usage (HID 1.11, 6.2.2.8).\n\nVerified on v6.12.105 with a UHID reproducer: a 2-byte report from\nsuch a descriptor trips KASAN before the patch and not after it."
    }
  ],
  "id": "CVE-2026-98499",
  "lastModified": "2026-10-24T14:16:44.603",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-18T16:17:00.913",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/26471d954bbfbfb9032994f7f485802ee20e0582"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/456afe4707e23cc114ad833197f63b52bb8fd1e7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4b09b7c84b8633cd041181616bd15bf5e73c164d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/65e7c4b5366b770c60dfefac3f1d06e33a9e411e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9aa237cf66495b2426ddde8532e9b08a0ed83aaa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c3129e6f26e18c0886ede7265f187a7ec289e1d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eaa7d29341ef4b91e84ad097562982288a7c376c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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