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HID: wacom: fix OOB read in wacom_wac_pen_serial_enforce()

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-98499

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98499

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "83417206427bdf0fef9fa69957807194f25923c3",
        "lessThan": "9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "83417206427bdf0fef9fa69957807194f25923c3",
        "lessThan": "26471d954bbfbfb9032994f7f485802ee20e0582",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "83417206427bdf0fef9fa69957807194f25923c3",
        "lessThan": "456afe4707e23cc114ad833197f63b52bb8fd1e7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "83417206427bdf0fef9fa69957807194f25923c3",
        "lessThan": "65e7c4b5366b770c60dfefac3f1d06e33a9e411e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "83417206427bdf0fef9fa69957807194f25923c3",
        "lessThan": "eaa7d29341ef4b91e84ad097562982288a7c376c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "83417206427bdf0fef9fa69957807194f25923c3",
        "lessThan": "c3129e6f26e18c0886ede7265f187a7ec289e1d1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "83417206427bdf0fef9fa69957807194f25923c3",
        "lessThan": "4b09b7c84b8633cd041181616bd15bf5e73c164d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "83417206427bdf0fef9fa69957807194f25923c3",
        "lessThan": "9aa237cf66495b2426ddde8532e9b08a0ed83aaa",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/hid/wacom_sys.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.16"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.16",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.55",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.9",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/hid/wacom_sys.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98499

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#55605 · Revision 1
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Publisher date
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