GHSA-FMFR-WC4P-75CJ
Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32In 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.
{
"affected": [],
"aliases": [
"CVE-2026-93114"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:18:05Z",
"severity": null
},
"details": "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.",
"id": "GHSA-fmfr-wc4p-75cj",
"modified": "2026-09-17T18:32:11Z",
"published": "2026-09-17T18:32:11Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93114"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2b3a5dabe89e330413af403246b648c1890f368f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3855be0100efb98c26228c610db70a673611f3bd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/428a82d987fcd8844e8868c85582eae75b4b5c51"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4faa43d4ef0b98beb6c2b77a279f4aa5d7fa2d13"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7fea5a310e3b2db24f7aafe64897e4e659ffbb7d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9b6479da662c2ec4e931ed9f7228df46aa8c3766"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f276b62f2ce1cbff7fa50a8ee5afd8fef5a60897"
}
],
"schema_version": "1.4.0",
"severity": []
}
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