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GHSA-4WFM-WP45-CW6M

Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

platform/chrome: sensorhub: Fix memory overread in ring handler

max_response and sensor_num are read from different EC commands:

  • max_response is from cros_ec_get_proto_info(). ec_dev->max_response = info->max_response_packet_size - sizeof(struct ec_host_response);

  • sensor_num is from cros_ec_get_sensor_count(). sensor_num = cros_ec_get_sensor_count(ec);

With a malfunctioning EC firmware, it is possible that the msg->insize (i.e., fifo_info_length in the context) could be clamped in cros_ec_cmd_xfer() because msg->insize is greater than max_response.

int fifo_info_length =
        sizeof(struct ec_response_motion_sense_fifo_info) +
        sizeof(u16) * sensorhub->sensor_num;

This means the number of read bytes could be less than expected. As a result, the subsequent memcpy() in cros_ec_sensorhub_ring_handler() overreads the resp->fifo_info buffer.

Check the return value of cros_ec_cmd_xfer_status() and abort if the number of bytes read does not match the expected length.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-93165"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:18:12Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/chrome: sensorhub: Fix memory overread in ring handler\n\n`max_response` and `sensor_num` are read from different EC commands:\n\n- `max_response` is from cros_ec_get_proto_info().\n    ec_dev-\u003emax_response = info-\u003emax_response_packet_size -\n                                    sizeof(struct ec_host_response);\n\n- `sensor_num` is from cros_ec_get_sensor_count().\n    sensor_num = cros_ec_get_sensor_count(ec);\n\nWith a malfunctioning EC firmware, it is possible that the `msg-\u003einsize`\n(i.e., `fifo_info_length` in the context) could be clamped in\ncros_ec_cmd_xfer() because `msg-\u003einsize` is greater than `max_response`.\n\n    int fifo_info_length =\n            sizeof(struct ec_response_motion_sense_fifo_info) +\n            sizeof(u16) * sensorhub-\u003esensor_num;\n\nThis means the number of read bytes could be less than expected.  As a\nresult, the subsequent memcpy() in cros_ec_sensorhub_ring_handler()\noverreads the `resp-\u003efifo_info` buffer.\n\nCheck the return value of cros_ec_cmd_xfer_status() and abort if the\nnumber of bytes read does not match the expected length.",
  "id": "GHSA-4wfm-wp45-cw6m",
  "modified": "2026-09-17T18:32:12Z",
  "published": "2026-09-17T18:32:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93165"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6268f46d83875d294d75b68b97a5b79953744598"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7780d93ae28f31fe517417c9451255315d1ad584"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7e901aaf95828364b05a2120a1bea1a1669bdc9a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/847a5ba0ac75f609e3f88da905251f7a76179145"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86bcfab7dff6f0a61cbe0660e5176e907353141b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98604cc8fd2578442f49cd113481e8fc83bc0ad3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1ceb2b2324717fa30b44d56ef0c52813e239569"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee0403520cdbcf87e853df9aaa9b518a0684ed38"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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