CVE-2026-64227

Summary

In the Linux kernel, the following vulnerability has been resolved: ACPI: driver: Check ACPI_COMPANION() against NULL during probe 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. Accordingly, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks against NULL to 13 platform drivers handling core ACPI devices. Also change the value returned by the ACPI thermal zone driver when the device's ACPI companion is not present to -ENODEV for consistency with the other drivers.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51Patch
• https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859Patch
• https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fcPatch
• https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ffPatch