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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.12Upgrade linux | Sep 30, 2026 | Sep 17, 2026 |
| Ubuntu | — | Upgrade linux-oracle-5.15Upgrade linux-azureUpgrade linux-realtimeUpgrade linux-oem-7.0Upgrade linux-bluefieldUpgrade linux-oracleUpgrade linux-gkeUpgrade linux-kvmUpgrade linux-aws-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-nvidiaUpgrade linux-riscvUpgrade linux-lowlatencyUpgrade linux-azure-fdeUpgrade linux-gcp-5.15Upgrade linux-awsUpgrade linux-hwe-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-riscv-7.0Upgrade linux-nvidia-tegraUpgrade linux-nvidia-tegra-5.15Upgrade linux-nvidia-tegra-igxUpgrade linux-gcp-fipsUpgrade linux-azure-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-gkeopUpgrade linux-gcpUpgrade linux-azure-fipsUpgrade linuxUpgrade linux-riscv-5.15Upgrade linux-ibmUpgrade linux-fipsUpgrade linux-ibm-5.15Upgrade linux-hwe-7.0Upgrade linux-aws-fipsUpgrade linux-intel-iotgUpgrade linux-azure-fde-5.15 | Nov 3, 2026 | Sep 17, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 30, 2026 | Sep 17, 2026 |
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