CVE-2026-64275 (GCVE-0-2026-64275)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-08-17 04:52
VLAI
Title
Input: elan_i2c - prevent division by zero and arithmetic underflow
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6696777c6506fa52b2a0282121195843ed855be6 , < 59d4cc5e7a9785e4bdc9c55273274c6b49d4b58d (git)
Affected: 6696777c6506fa52b2a0282121195843ed855be6 , < f6d10af2036d1d4a847a74fe47ebbf93bce3c84c (git)
Affected: 6696777c6506fa52b2a0282121195843ed855be6 , < 2f281ff0163a38fdc4cb4061f0c241e643283a5e (git)
Affected: 6696777c6506fa52b2a0282121195843ed855be6 , < 8c1db3418a419e788691746b9c47f863c2fd4890 (git)
Affected: 6696777c6506fa52b2a0282121195843ed855be6 , < feb4866a42ec94764c7eb58012256f6f37664727 (git)
Affected: 6696777c6506fa52b2a0282121195843ed855be6 , < 01e0317c256c560d8dcce2e9825eb6142ee34611 (git)
Affected: 6696777c6506fa52b2a0282121195843ed855be6 , < 6bac57d8fe2a077b8a85b4140eeb7999078158eb (git)
Affected: 6696777c6506fa52b2a0282121195843ed855be6 , < df2b818fa009c10ff6ba875a1663ff001cda9558 (git)
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Linux Linux Affected: 3.19
Unaffected: 0 , < 3.19 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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            "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."
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        "id": "CVE-2026-64275",
        "lastModified": "2026-10-24T13:10:00.147",
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                "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"
            }
          ]
        },
        "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",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2f281ff0163a38fdc4cb4061f0c241e643283a5e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/59d4cc5e7a9785e4bdc9c55273274c6b49d4b58d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/6bac57d8fe2a077b8a85b4140eeb7999078158eb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8c1db3418a419e788691746b9c47f863c2fd4890"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/df2b818fa009c10ff6ba875a1663ff001cda9558"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f6d10af2036d1d4a847a74fe47ebbf93bce3c84c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "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"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-13T19:35:40+00:00",
      "cve": "CVE-2026-64275",
      "id": "CVE-2026-64275",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Input: elan_i2c - prevent division by zero and arithmetic underflow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64275.json",
      "version": "3"
    }
  }
}



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