PT-2026-64342 · Linux · Linux

CVE-2026-64227 · Published 2026-07-24 · Updated 2026-07-24

Mitre

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.

Related Identifiers

CVE-2026-64227

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-64227 · Security Note
• https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859 · Note
• https://git.kernel.org/stable/c/f1e12d81f9cd250e722da01c7670b518d4181406 · Note
• https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51 · Note
• https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc · Note
• https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff · Note