FKIE_CVE-2026-89999

Vulnerability from fkie_nvd - Published: 2026-09-16 11:17 - Updated: 2026-10-19 09:18
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: validate report length in wacom_intuos_pro2_bt_irq wacom_intuos_pro2_bt_irq() receives the wire report length in `len` but never consults it before parsing. After the report-id gate it unconditionally calls wacom_intuos_pro2_bt_pen() and then, selected by features.type, a fixed chain of sub-parsers, none of which receive `len`: wacom_intuos_pro2_bt_pen(wacom); if (type == INTUOSP2_BT || type == INTUOSP2S_BT) { wacom_intuos_pro2_bt_touch(wacom); wacom_intuos_pro2_bt_pad(wacom); wacom_intuos_pro2_bt_battery(wacom); } else { wacom_intuos_gen3_bt_pad(wacom); wacom_intuos_gen3_bt_battery(wacom); } Each sub-parser dereferences wacom->data at fixed offsets. The furthest byte touched on each branch is: INTUOSP2_BT / INTUOSP2S_BT: wacom_intuos_pro2_bt_pad() reads data[285] (the touchring byte), so the report must be at least 286 bytes; INTUOSHT3_BT ("gen3"): wacom_intuos_gen3_bt_battery() reads data[45], so the report must be at least 46 bytes. features.type is selected from the VID/PID id_table entry and wacom_setup_device_quirks() force-registers the pen/pad/touch inputs for that type independent of the report descriptor, so a malicious or malfunctioning paired/spoofed Bluetooth peripheral can advertise that VID/PID and send an undersized report that still satisfies the data[0] == 0x80/0x81 gate. The driver then reads past the received report and forwards the bytes to userspace via evdev (MSC_SERIAL / ABS_MISC / ABS_WHEEL on the pen and pad input nodes), an out-of-bounds read with a concrete userspace read-back channel, and a true out-of-bounds read on transports whose backing buffer is sized to the (small) report descriptor rather than a fixed-size staging buffer. This is the same class of bug commit 2f1763f62909 ("HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq") already hardened in the sibling wacom_intuos_bt_irq(), which guards each report id against its minimum length before parsing. Guard wacom_intuos_pro2_bt_irq() the same way: before parsing, reject reports shorter than the furthest offset the selected branch actually dereferences, warn, and bail out. Because the whole pen/touch/pad/ battery chain runs unconditionally per branch, a single up-front check against the maximum offset (286 bytes for INTUOSP2_BT/INTUOSP2S_BT, 46 bytes for the gen3 branch) bounds every sub-parser. Returning 0 on a short report also skips those calls for the same malformed report, which is the safe, conservative behavior.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0cdc6cb242dd8d2731956fdf3390de094482a4b2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/114af803e409a68e52516810ecd24df4d8ce0c68
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1bfc0547b81d5861443420d19b5ed2fd533cd17f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74ec08f7b81c2726578039ca6dea0fec136c38ea
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84781a1f3c5dc6650480be9329e6e8528939eaa0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96dd0af7597aba2d80cc97e2f66e8b72d30ba125
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a8e04f3f894ccb52cfcd7e60125a9f35da4a616d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d2844f3fcd058113acbe0aa110ab13ef28b98d9f
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/wacom_wac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d2844f3fcd058113acbe0aa110ab13ef28b98d9f",
              "status": "affected",
              "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b",
              "versionType": "git"
            },
            {
              "lessThan": "1bfc0547b81d5861443420d19b5ed2fd533cd17f",
              "status": "affected",
              "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b",
              "versionType": "git"
            },
            {
              "lessThan": "84781a1f3c5dc6650480be9329e6e8528939eaa0",
              "status": "affected",
              "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b",
              "versionType": "git"
            },
            {
              "lessThan": "96dd0af7597aba2d80cc97e2f66e8b72d30ba125",
              "status": "affected",
              "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b",
              "versionType": "git"
            },
            {
              "lessThan": "114af803e409a68e52516810ecd24df4d8ce0c68",
              "status": "affected",
              "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b",
              "versionType": "git"
            },
            {
              "lessThan": "74ec08f7b81c2726578039ca6dea0fec136c38ea",
              "status": "affected",
              "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b",
              "versionType": "git"
            },
            {
              "lessThan": "0cdc6cb242dd8d2731956fdf3390de094482a4b2",
              "status": "affected",
              "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b",
              "versionType": "git"
            },
            {
              "lessThan": "a8e04f3f894ccb52cfcd7e60125a9f35da4a616d",
              "status": "affected",
              "version": "4922cd26f03c1c71bf7dd6cbdb638e7e36a4a50b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/wacom_wac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.11"
            },
            {
              "lessThan": "4.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "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: validate report length in wacom_intuos_pro2_bt_irq\n\nwacom_intuos_pro2_bt_irq() receives the wire report length in `len`\nbut never consults it before parsing. After the report-id gate it\nunconditionally calls wacom_intuos_pro2_bt_pen() and then, selected by\nfeatures.type, a fixed chain of sub-parsers, none of which receive\n`len`:\n\n\twacom_intuos_pro2_bt_pen(wacom);\n\tif (type == INTUOSP2_BT || type == INTUOSP2S_BT) {\n\t\twacom_intuos_pro2_bt_touch(wacom);\n\t\twacom_intuos_pro2_bt_pad(wacom);\n\t\twacom_intuos_pro2_bt_battery(wacom);\n\t} else {\n\t\twacom_intuos_gen3_bt_pad(wacom);\n\t\twacom_intuos_gen3_bt_battery(wacom);\n\t}\n\nEach sub-parser dereferences wacom-\u003edata at fixed offsets. The furthest\nbyte touched on each branch is:\n\n  INTUOSP2_BT / INTUOSP2S_BT: wacom_intuos_pro2_bt_pad() reads data[285]\n\t(the touchring byte), so the report must be at least 286 bytes;\n  INTUOSHT3_BT (\"gen3\"): wacom_intuos_gen3_bt_battery() reads data[45],\n\tso the report must be at least 46 bytes.\n\nfeatures.type is selected from the VID/PID id_table entry and\nwacom_setup_device_quirks() force-registers the pen/pad/touch inputs\nfor that type independent of the report descriptor, so a malicious or\nmalfunctioning paired/spoofed Bluetooth peripheral can advertise that\nVID/PID and send an undersized report that still satisfies the\ndata[0] == 0x80/0x81 gate. The driver then reads past the received\nreport and forwards the bytes to userspace via evdev (MSC_SERIAL /\nABS_MISC / ABS_WHEEL on the pen and pad input nodes), an out-of-bounds\nread with a concrete userspace read-back channel, and a true\nout-of-bounds read on transports whose backing buffer is sized to the\n(small) report descriptor rather than a fixed-size staging buffer.\n\nThis is the same class of bug commit 2f1763f62909 (\"HID: wacom: fix\nout-of-bounds read in wacom_intuos_bt_irq\") already hardened in the\nsibling wacom_intuos_bt_irq(), which guards each report id against its\nminimum length before parsing.\n\nGuard wacom_intuos_pro2_bt_irq() the same way: before parsing, reject\nreports shorter than the furthest offset the selected branch actually\ndereferences, warn, and bail out. Because the whole pen/touch/pad/\nbattery chain runs unconditionally per branch, a single up-front check\nagainst the maximum offset (286 bytes for INTUOSP2_BT/INTUOSP2S_BT,\n46 bytes for the gen3 branch) bounds every sub-parser. Returning 0 on\na short report also skips those calls for the same malformed report,\nwhich is the safe, conservative behavior."
    }
  ],
  "id": "CVE-2026-89999",
  "lastModified": "2026-10-19T09:18:47.303",
  "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": "2026-09-16T11:17:11.177",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0cdc6cb242dd8d2731956fdf3390de094482a4b2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/114af803e409a68e52516810ecd24df4d8ce0c68"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1bfc0547b81d5861443420d19b5ed2fd533cd17f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/74ec08f7b81c2726578039ca6dea0fec136c38ea"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/84781a1f3c5dc6650480be9329e6e8528939eaa0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/96dd0af7597aba2d80cc97e2f66e8b72d30ba125"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a8e04f3f894ccb52cfcd7e60125a9f35da4a616d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d2844f3fcd058113acbe0aa110ab13ef28b98d9f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.