CVE-2026-64274 (GCVE-0-2026-64274)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-08-17 04:52
VLAI
Title
Input: goodix - clamp the device-reported contact count
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: goodix - clamp the device-reported contact count goodix_ts_read_input_report() copies the number of touch points reported by the device into an on-stack buffer u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; which is sized for at most GOODIX_MAX_CONTACTS (10) contacts. The only runtime check bounds the per-interrupt count against ts->max_touch_num, but that value is taken verbatim from a 4-bit field of the device configuration block and is never clamped: ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; The nibble can be 0..15, so a malfunctioning, malicious or counterfeit controller (or an attacker tampering with the I2C bus) can advertise up to 15 contacts. goodix_ts_read_input_report() then accepts a touch_num of up to 15 and the second goodix_i2c_read() writes ts->contact_size * (touch_num - 1) bytes past the one-contact header into point_data - up to 30 bytes (45 with the 9-byte report format) beyond the 92-byte buffer: a stack out-of-bounds write. Clamp max_touch_num to GOODIX_MAX_CONTACTS, the number of contacts point_data[] is sized for, when reading it from the configuration.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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: a7ac7c95d4682883d141c5d7a7544d2818f0a09f , < e825f352ef5271255cd08cc994b0dc25648a2f38 (git)
Affected: a7ac7c95d4682883d141c5d7a7544d2818f0a09f , < 4bfea9c3a0981c1c7fc5d1a1b27197b2de247902 (git)
Affected: a7ac7c95d4682883d141c5d7a7544d2818f0a09f , < 98b2caef249183b572c04451365246f919707845 (git)
Affected: a7ac7c95d4682883d141c5d7a7544d2818f0a09f , < 719d1a2c83a46be6bf81af905e4f6adb3d32dc28 (git)
Affected: a7ac7c95d4682883d141c5d7a7544d2818f0a09f , < 46addbd13dbf4aacb71cfbca964a5e552d0f45ae (git)
Affected: a7ac7c95d4682883d141c5d7a7544d2818f0a09f , < 3b32303460155603d25444274856013d211d5e1f (git)
Affected: a7ac7c95d4682883d141c5d7a7544d2818f0a09f , < 2a67668690129953e898923260a2dd1c7c196495 (git)
Affected: a7ac7c95d4682883d141c5d7a7544d2818f0a09f , < 5ed62a96e06be4e94b8296b7932afee550a70e04 (git)
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Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (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": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: goodix - clamp the device-reported contact count\n\ngoodix_ts_read_input_report() copies the number of touch points reported\nby the device into an on-stack buffer\n\n\tu8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];\n\nwhich is sized for at most GOODIX_MAX_CONTACTS (10) contacts. The only\nruntime check bounds the per-interrupt count against ts-\u003emax_touch_num,\nbut that value is taken verbatim from a 4-bit field of the device\nconfiguration block and is never clamped:\n\n\tts-\u003emax_touch_num = ts-\u003econfig[MAX_CONTACTS_LOC] \u0026 0x0f;\n\nThe nibble can be 0..15, so a malfunctioning, malicious or counterfeit\ncontroller (or an attacker tampering with the I2C bus) can advertise up\nto 15 contacts. goodix_ts_read_input_report() then accepts a touch_num\nof up to 15 and the second goodix_i2c_read() writes\nts-\u003econtact_size * (touch_num - 1) bytes past the one-contact header into\npoint_data - up to 30 bytes (45 with the 9-byte report format) beyond the\n92-byte buffer: a stack out-of-bounds write.\n\nClamp max_touch_num to GOODIX_MAX_CONTACTS, the number of contacts\npoint_data[] is sized for, when reading it from the configuration."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nInput: goodix - limitar el recuento de contactos informado por el dispositivo\n\ngoodix_ts_read_input_report() copia el n\u00famero de puntos t\u00e1ctiles informados por el dispositivo en un b\u00fafer en la pila\n\nu8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];\n\nel cual tiene un tama\u00f1o para un m\u00e1ximo de GOODIX_MAX_CONTACTS (10) contactos. La \u00fanica comprobaci\u00f3n en tiempo de ejecuci\u00f3n limita el recuento por interrupci\u00f3n contra ts  -\u003e  max_touch_num, pero ese valor se toma textualmente de un campo de 4 bits del bloque de configuraci\u00f3n del dispositivo y nunca se limita:\n\nts  -\u003e  max_touch_num = ts  -\u003e  config[MAX_CONTACTS_LOC] \u0026 0x0f;\n\nEl nibble puede ser 0..15, por lo que un controlador defectuoso, malicioso o falsificado (o un atacante manipulando el bus I2C) puede anunciar hasta 15 contactos. goodix_ts_read_input_report() entonces acepta un touch_num de hasta 15 y la segunda goodix_i2c_read() escribe ts  -\u003e  contact_size * (touch_num - 1) bytes m\u00e1s all\u00e1 de la cabecera de un contacto en point_data - hasta 30 bytes (45 con el formato de informe de 9 bytes) m\u00e1s all\u00e1 del b\u00fafer de 92 bytes: una escritura fuera de l\u00edmites de la pila.\n\nLimitar max_touch_num a GOODIX_MAX_CONTACTS, el n\u00famero de contactos para el que point_data[] tiene el tama\u00f1o, al leerlo de la configuraci\u00f3n."
          }
        ],
        "id": "CVE-2026-64274",
        "lastModified": "2026-10-24T13:10:00.147",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-07-25T10:17:07.797",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2a67668690129953e898923260a2dd1c7c196495"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/3b32303460155603d25444274856013d211d5e1f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/46addbd13dbf4aacb71cfbca964a5e552d0f45ae"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4bfea9c3a0981c1c7fc5d1a1b27197b2de247902"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5ed62a96e06be4e94b8296b7932afee550a70e04"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/719d1a2c83a46be6bf81af905e4f6adb3d32dc28"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/98b2caef249183b572c04451365246f919707845"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e825f352ef5271255cd08cc994b0dc25648a2f38"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-19T23:36:49+00:00",
      "cve": "CVE-2026-64274",
      "id": "CVE-2026-64274",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_not_affected": "275",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Input: goodix - clamp the device-reported contact count",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64274.json",
      "version": "3"
    }
  }
}



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