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.

References

• https://git.kernel.org/stable/c/2b3a5dabe89e330413af403246b648c1890f368f
• https://git.kernel.org/stable/c/3855be0100efb98c26228c610db70a673611f3bd
• https://git.kernel.org/stable/c/428a82d987fcd8844e8868c85582eae75b4b5c51
• https://git.kernel.org/stable/c/4faa43d4ef0b98beb6c2b77a279f4aa5d7fa2d13
• https://git.kernel.org/stable/c/7fea5a310e3b2db24f7aafe64897e4e659ffbb7d