CVE-2026-93081: Linux

EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix SCMI device destroy lifetimes scmi_child_dev_find() drops the reference returned by device_find_child() before returning the scmi_device pointer. A concurrent unregister can then release the device while the destroy path is still using the returned pointer. Make the lookup helper return the device_find_child() reference and keep it until scmi_device_destroy() has finished unregistering the child. Also split device_unregister() in __scmi_device_destroy() so the SCMI bus ID is not made reusable until after device_del() has removed the old scmi_dev.N name from sysfs. This avoids a new SCMI device reusing the same ID while the old device is still registered. The final device release callback is also a possible cleanup path when SCMI children are deleted by driver core recursion rather than __scmi_device_destroy(). Release the SCMI bus ID from a common helper used by destroy, register-failure and final-release paths, and clear scmi_dev->id after freeing it so the final release cannot free the same ID again.

Affected products

• Linux Linux: from 5.15.182, before 5.16 (fixed in 5.16); from 6.1.138, before 6.2 (fixed in 6.2); from 6.6.90, before 6.7 (fixed in 6.7); from 6.12.28, before 6.13 (fixed in 6.13); from 6.14.6, before 6.15 (fixed in 6.15); from 6.15, before 7.2.6 (fixed in 7.2.6)

Published 2026-09-17. Last modified 2026-09-17.