CVE-2026-93114
Description
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.
How to fix
- Linux Linux4faa43d4ef0b98beb6c2b77a279f4aa5d7fa2d13, 3855be0100efb98c26228c610db70a673611f3bd, f276b62f2ce1cbff7fa50a8ee5afd8fef5a60897, 9b6479da662c2ec4e931ed9f7228df46aa8c3766, 7fea5a310e3b2db24f7aafe64897e4e659ffbb7d, 428a82d987fcd8844e8868c85582eae75b4b5c51, 2b3a5dabe89e330413af403246b648c1890f368f or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | a9e10e58730432e5de840eb3ddd55c75f29341b3 ≤ v < 4faa43d4ef0b98beb6c2b77a279f4aa5d7fa2d13, a9e10e58730432e5de840eb3ddd55c75f29341b3 ≤ v < 3855be0100efb98c26228c610db70a673611f3bd, a9e10e58730432e5de840eb3ddd55c75f29341b3 ≤ v < f276b62f2ce1cbff7fa50a8ee5afd8fef5a60897, a9e10e58730432e5de840eb3ddd55c75f29341b3 ≤ v < 9b6479da662c2ec4e931ed9f7228df46aa8c3766, a9e10e58730432e5de840eb3ddd55c75f29341b3 ≤ v < 7fea5a310e3b2db24f7aafe64897e4e659ffbb7d, a9e10e58730432e5de840eb3ddd55c75f29341b3 ≤ v < 428a82d987fcd8844e8868c85582eae75b4b5c51, a9e10e58730432e5de840eb3ddd55c75f29341b3 ≤ v < 2b3a5dabe89e330413af403246b648c1890f368f, 5.14 | 4faa43d4ef0b98beb6c2b77a279f4aa5d7fa2d13, 3855be0100efb98c26228c610db70a673611f3bd, f276b62f2ce1cbff7fa50a8ee5afd8fef5a60897, 9b6479da662c2ec4e931ed9f7228df46aa8c3766, 7fea5a310e3b2db24f7aafe64897e4e659ffbb7d, 428a82d987fcd8844e8868c85582eae75b4b5c51, 2b3a5dabe89e330413af403246b648c1890f368f |
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