FKIE_CVE-2026-64274

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-07-30 15:00
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2a67668690129953e898923260a2dd1c7c196495
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b32303460155603d25444274856013d211d5e1f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46addbd13dbf4aacb71cfbca964a5e552d0f45ae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4bfea9c3a0981c1c7fc5d1a1b27197b2de247902
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5ed62a96e06be4e94b8296b7932afee550a70e04
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/719d1a2c83a46be6bf81af905e4f6adb3d32dc28
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98b2caef249183b572c04451365246f919707845
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e825f352ef5271255cd08cc994b0dc25648a2f38
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/touchscreen/goodix.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e825f352ef5271255cd08cc994b0dc25648a2f38",
              "status": "affected",
              "version": "a7ac7c95d4682883d141c5d7a7544d2818f0a09f",
              "versionType": "git"
            },
            {
              "lessThan": "4bfea9c3a0981c1c7fc5d1a1b27197b2de247902",
              "status": "affected",
              "version": "a7ac7c95d4682883d141c5d7a7544d2818f0a09f",
              "versionType": "git"
            },
            {
              "lessThan": "98b2caef249183b572c04451365246f919707845",
              "status": "affected",
              "version": "a7ac7c95d4682883d141c5d7a7544d2818f0a09f",
              "versionType": "git"
            },
            {
              "lessThan": "719d1a2c83a46be6bf81af905e4f6adb3d32dc28",
              "status": "affected",
              "version": "a7ac7c95d4682883d141c5d7a7544d2818f0a09f",
              "versionType": "git"
            },
            {
              "lessThan": "46addbd13dbf4aacb71cfbca964a5e552d0f45ae",
              "status": "affected",
              "version": "a7ac7c95d4682883d141c5d7a7544d2818f0a09f",
              "versionType": "git"
            },
            {
              "lessThan": "3b32303460155603d25444274856013d211d5e1f",
              "status": "affected",
              "version": "a7ac7c95d4682883d141c5d7a7544d2818f0a09f",
              "versionType": "git"
            },
            {
              "lessThan": "2a67668690129953e898923260a2dd1c7c196495",
              "status": "affected",
              "version": "a7ac7c95d4682883d141c5d7a7544d2818f0a09f",
              "versionType": "git"
            },
            {
              "lessThan": "5ed62a96e06be4e94b8296b7932afee550a70e04",
              "status": "affected",
              "version": "a7ac7c95d4682883d141c5d7a7544d2818f0a09f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/touchscreen/goodix.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.1"
            },
            {
              "lessThan": "4.1",
              "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-rc1",
              "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\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."
    }
  ],
  "id": "CVE-2026-64274",
  "lastModified": "2026-07-30T15:00:27.343",
  "metrics": {},
  "published": "2026-07-25T10:17:07.797",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2a67668690129953e898923260a2dd1c7c196495"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b32303460155603d25444274856013d211d5e1f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/46addbd13dbf4aacb71cfbca964a5e552d0f45ae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4bfea9c3a0981c1c7fc5d1a1b27197b2de247902"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5ed62a96e06be4e94b8296b7932afee550a70e04"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/719d1a2c83a46be6bf81af905e4f6adb3d32dc28"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/98b2caef249183b572c04451365246f919707845"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e825f352ef5271255cd08cc994b0dc25648a2f38"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}



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