CVE-2026-64227
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51
- https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859
- https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc
- https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff
- https://git.kernel.org/stable/c/f1e12d81f9cd250e722da01c7670b518d4181406
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.