FKIE_CVE-2026-64275

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-11-06 17:18
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: elan_i2c - prevent division by zero and arithmetic underflow The Elan I2C touchpad driver queries the device for its physical dimensions and trace counts to calculate the device resolution and width. However, if the device firmware or device tree provides invalid zero values for x_traces or y_traces, it results in a fatal division-by-zero exception leading to a kernel panic during device probe. Add checks to ensure these parameters are non-zero before performing the division. If invalid trace values are detected, fall back to a safe default of 1. Additionally, prevent an arithmetic underflow in the touch reporting logic. Previously, if the calculated or fallback width was smaller than ETP_FWIDTH_REDUCE (90), the subtraction would underflow, resulting in a massive unsigned integer being reported to userspace. Clamp the adjusted width to a minimum of 0 to safely handle small physical dimensions and fallback scenarios. Completing the probe with safe fallback values ensures the sysfs nodes are created, keeping the firmware update path intact so a recovery firmware can be flashed to the device.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/01e0317c256c560d8dcce2e9825eb6142ee34611Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f281ff0163a38fdc4cb4061f0c241e643283a5ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/59d4cc5e7a9785e4bdc9c55273274c6b49d4b58dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6bac57d8fe2a077b8a85b4140eeb7999078158ebPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c1db3418a419e788691746b9c47f863c2fd4890Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/df2b818fa009c10ff6ba875a1663ff001cda9558Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f6d10af2036d1d4a847a74fe47ebbf93bce3c84cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/feb4866a42ec94764c7eb58012256f6f37664727Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/mouse/elan_i2c_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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            {
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "6696777c6506fa52b2a0282121195843ed855be6",
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            },
            {
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            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/mouse/elan_i2c_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.19"
            },
            {
              "lessThan": "3.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
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          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: elan_i2c - prevent division by zero and arithmetic underflow\n\nThe Elan I2C touchpad driver queries the device for its physical\ndimensions and trace counts to calculate the device resolution and width.\nHowever, if the device firmware or device tree provides invalid zero\nvalues for x_traces or y_traces, it results in a fatal division-by-zero\nexception leading to a kernel panic during device probe.\n\nAdd checks to ensure these parameters are non-zero before performing\nthe division. If invalid trace values are detected, fall back to a safe\ndefault of 1.\n\nAdditionally, prevent an arithmetic underflow in the touch reporting\nlogic. Previously, if the calculated or fallback width was smaller than\nETP_FWIDTH_REDUCE (90), the subtraction would underflow, resulting in a\nmassive unsigned integer being reported to userspace. Clamp the adjusted\nwidth to a minimum of 0 to safely handle small physical dimensions and\nfallback scenarios.\n\nCompleting the probe with safe fallback values ensures the sysfs nodes\nare created, keeping the firmware update path intact so a recovery\nfirmware can be flashed to the device."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nEntrada: elan_i2c - prevenir la divisi\u00f3n por cero y el desbordamiento negativo aritm\u00e9tico\n\nEl controlador del panel t\u00e1ctil Elan I2C consulta el dispositivo para sus dimensiones f\u00edsicas y recuentos de trazas para calcular la resoluci\u00f3n y el ancho del dispositivo. Sin embargo, si el firmware del dispositivo o el \u00e1rbol de dispositivos proporciona valores cero inv\u00e1lidos para x_traces o y_traces, resulta en una excepci\u00f3n fatal de divisi\u00f3n por cero que lleva a un p\u00e1nico del kernel durante la detecci\u00f3n del dispositivo.\n\nA\u00f1adir comprobaciones para asegurar que estos par\u00e1metros no sean cero antes de realizar la divisi\u00f3n. Si se detectan valores de traza inv\u00e1lidos, se recurre a un valor predeterminado seguro de 1.\n\nAdem\u00e1s, prevenir un desbordamiento negativo aritm\u00e9tico en la l\u00f3gica de informe t\u00e1ctil. Anteriormente, si el ancho calculado o de respaldo era menor que ETP_FWIDTH_REDUCE (90), la resta sufrir\u00eda un desbordamiento negativo, resultando en un entero sin signo masivo siendo informado al espacio de usuario. Limitar el ancho ajustado a un m\u00ednimo de 0 para manejar de forma segura peque\u00f1as dimensiones f\u00edsicas y escenarios de respaldo.\n\nCompletar la detecci\u00f3n con valores de respaldo seguros asegura que los nodos sysfs sean creados, manteniendo intacta la ruta de actualizaci\u00f3n del firmware para que un firmware de recuperaci\u00f3n pueda ser flasheado al dispositivo."
    }
  ],
  "id": "CVE-2026-64275",
  "lastModified": "2026-11-06T17:18:45.083",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-64275",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-11-06T16:33:38.485466Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-25T10:17:07.927",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/01e0317c256c560d8dcce2e9825eb6142ee34611"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/2f281ff0163a38fdc4cb4061f0c241e643283a5e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/6bac57d8fe2a077b8a85b4140eeb7999078158eb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/8c1db3418a419e788691746b9c47f863c2fd4890"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/df2b818fa009c10ff6ba875a1663ff001cda9558"
    },
    {
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/f6d10af2036d1d4a847a74fe47ebbf93bce3c84c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/feb4866a42ec94764c7eb58012256f6f37664727"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-369"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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