CVE-2026-64227
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.
Affected versions
Fixed in
6.6.145,
6.12.97,
6.18.40,
7.0.11,
7.1
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-64227?
CVE-2026-64227 is a unscored severity Linux kernel vulnerability . CVE-2026-64227 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-64227?
Yes. CVE-2026-64227 has been patched. Fixed versions include 6.6.145, 6.12.97, 6.18.40 and others.
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Is CVE-2026-64227 actively exploited?
No. CVE-2026-64227 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.