Medium 5.5Published Jul 24, 2026

CVE-2026-64227ACPI: driver: Check ACPI_COMPANION() against NULL during probe

Updated under an hour ago (Oct 27, 2026, 1:20 AM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Jul 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 5829046825ac89fffc60f2670bc564fda2c0155a before a9451bf561232314755baf69a5916e0ac77f33fc; 5829046825ac89fffc60f2670bc564fda2c0155a builds before 34f4d0e4e5065237d15651df759a99e81b7f9f51; 5829046825ac89fffc60f2670bc564fda2c0155a builds before 612ddab8fce04394bd7aebe8e0f2599642e30859; from 5829046825ac89fffc60f2670bc564fda2c0155a before e4865a56d013e86e46ea6acea15bb6eae01898ff	CNA record
linux linux_kernel linux:linux_kernel	from 6.7 before 6.12.97; from 6.13 before 6.18.40; from 6.19 before 7.0.11; 7.1; 7.1; 7.1	NVD

References

References

https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc	patch
https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51	patch
https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859	patch
https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.