platform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race

{
  "id": "8d2f9bc6160161a87e323040f64ed5a7fc3cadcf1869027d5e3d38da61b7c162",
  "url": "https://osv.dev/vulnerability/CVE-2025-21685",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "platform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: platform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race The yt2_1380_fc_serdev_probe() function calls devm_serdev_device_open() before setting the client ops via serdev_device_set_client_ops(). This ordering can trigger a NULL pointer dereference in the serdev controller's receive_buf handler, as it assumes serdev->ops is valid when SERPORT_ACTIVE is set. This is similar to the issue fixed in commit 5e700b384ec1 (\"platform/chrome: cros_ec_uart: properly fix race condition\") where devm_serdev_device_open() was called before fully initializing the device. Fix the race by ensuring client ops are set before enabling the port via devm_serdev_device_open(). Note, serdev_device_set_baudrate() and serdev_device_set_flow_control() calls should be after the devm_serdev_device_open() call.",
    "evidence": "osv:CVE-2025-21685",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
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        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.12.11",
            "evidence": "/affected/1/ranges"
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    "severity": "medium",
    "structured": {
      "id": "CVE-2025-21685",
      "aliases": [
        "CVE-2025-21685"
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      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
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      "affected": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "database_specific": {
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        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.10.0"
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                {
                  "fixed": "6.12.11"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21685.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.531078850Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3f67e07873df3c6d9ce2582260b83732e1d3a40b",
        "https://git.kernel.org/stable/c/59616a91e5e74833b2008b56c66879857c616006",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21685.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21685",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21685.json"
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    "related_cves": [
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        "value": "CVE-2025-21685",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 497419,
  "published_at": "2025-02-09T11:37:25.264+00:00"
}