CVE-2026-93114 (GCVE-0-2026-93114)
Vulnerability from cvelistv5
Published
2026-09-17 16:11
Modified
2026-10-19 09:05
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: platform/surface: acpi-notify: Check ACPI companion before use Since every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), platform drivers that rely on the existence of a device's ACPI companion object should verify its presence. san_probe() dereferences the result of ACPI_COMPANION() when installing the GSBUS address space handler, so force-binding the driver to a device without an ACPI companion leads to a NULL pointer dereference. The dereference was introduced when the probe function was switched from ACPI_HANDLE() to ACPI_COMPANION(). Check the ACPI companion against NULL and return -ENODEV when it is missing, like commit e4865a56d013 ("ACPI: driver: Check ACPI_COMPANION() against NULL during probe") does for the core ACPI platform drivers.
References
Impacted products
Vendor Product Version
Linux Linux Version: a9e10e58730432e5de840eb3ddd55c75f29341b3
Version: a9e10e58730432e5de840eb3ddd55c75f29341b3
Version: a9e10e58730432e5de840eb3ddd55c75f29341b3
Version: a9e10e58730432e5de840eb3ddd55c75f29341b3
Version: a9e10e58730432e5de840eb3ddd55c75f29341b3
Version: a9e10e58730432e5de840eb3ddd55c75f29341b3
Version: a9e10e58730432e5de840eb3ddd55c75f29341b3
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{
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          "programFiles": [
            "drivers/platform/surface/surface_acpi_notify.c"
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/surface: acpi-notify: Check ACPI companion before use\n\nSince every platform driver can be forced to match a device that doesn\u0027t\nmatch its list of device IDs because of device_match_driver_override(),\nplatform drivers that rely on the existence of a device\u0027s ACPI companion\nobject should verify its presence.\n\nsan_probe() dereferences the result of ACPI_COMPANION() when installing\nthe GSBUS address space handler, so force-binding the driver to a device\nwithout an ACPI companion leads to a NULL pointer dereference.  The\ndereference was introduced when the probe function was switched from\nACPI_HANDLE() to ACPI_COMPANION().\n\nCheck the ACPI companion against NULL and return -ENODEV when it is\nmissing, like commit e4865a56d013 (\"ACPI: driver: Check ACPI_COMPANION()\nagainst NULL during probe\") does for the core ACPI platform drivers."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:05:48.069Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/4faa43d4ef0b98beb6c2b77a279f4aa5d7fa2d13"
        },
        {
          "url": "https://git.kernel.org/stable/c/3855be0100efb98c26228c610db70a673611f3bd"
        },
        {
          "url": "https://git.kernel.org/stable/c/f276b62f2ce1cbff7fa50a8ee5afd8fef5a60897"
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          "url": "https://git.kernel.org/stable/c/9b6479da662c2ec4e931ed9f7228df46aa8c3766"
        },
        {
          "url": "https://git.kernel.org/stable/c/7fea5a310e3b2db24f7aafe64897e4e659ffbb7d"
        },
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          "url": "https://git.kernel.org/stable/c/428a82d987fcd8844e8868c85582eae75b4b5c51"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b3a5dabe89e330413af403246b648c1890f368f"
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      "title": "platform/surface: acpi-notify: Check ACPI companion before use",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93114",
    "datePublished": "2026-09-17T16:11:22.463Z",
    "dateReserved": "2026-09-17T16:02:15.086Z",
    "dateUpdated": "2026-10-19T09:05:48.069Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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