CVE-2025-21685
Vulnerability from cvelistv5
Published
2025-02-09 11:37
Modified
2025-02-09 11:37
Severity ?
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3f67e07873df3c6d9ce2582260b83732e1d3a40bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/59616a91e5e74833b2008b56c66879857c616006Patch
Impacted products
Vendor Product Version
Linux Linux Version: b2ed33e8d486ab2f1920131dd76fab38c8ef3550
Version: b2ed33e8d486ab2f1920131dd76fab38c8ef3550
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   Linux Linux Version: 6.10
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/x86/lenovo-yoga-tab2-pro-1380-fastcharger.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "lessThan": "3f67e07873df3c6d9ce2582260b83732e1d3a40b",
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race\n\nThe yt2_1380_fc_serdev_probe() function calls devm_serdev_device_open()\nbefore setting the client ops via serdev_device_set_client_ops(). This\nordering can trigger a NULL pointer dereference in the serdev controller\u0027s\nreceive_buf handler, as it assumes serdev-\u003eops is valid when\nSERPORT_ACTIVE is set.\n\nThis is similar to the issue fixed in commit 5e700b384ec1\n(\"platform/chrome: cros_ec_uart: properly fix race condition\") where\ndevm_serdev_device_open() was called before fully initializing the\ndevice.\n\nFix the race by ensuring client ops are set before enabling the port via\ndevm_serdev_device_open().\n\nNote, serdev_device_set_baudrate() and serdev_device_set_flow_control()\ncalls should be after the devm_serdev_device_open() call."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-02-09T11:37:25.264Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        },
        {
          "url": "https://git.kernel.org/stable/c/59616a91e5e74833b2008b56c66879857c616006"
        }
      ],
      "title": "platform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21685",
    "datePublished": "2025-02-09T11:37:25.264Z",
    "dateReserved": "2024-12-29T08:45:45.740Z",
    "dateUpdated": "2025-02-09T11:37:25.264Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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  }
}


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