CVE-2026-72008

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

pmdomain: mediatek: Fix possible nullptr KP in HWV cleanup/on-check

Should probe fail for HW_VOTER type power domains, this driver was

unconditionally trying to perform cleanup for DIRECT_CTL domains,

but only after checking if the target domain is powered on... with

the DIRECT_CTL scpsys_domain_is_on() code again.

And there's more: the scpsys_domain_is_on() function is also being

unconditionally used in the probe path, for any power domain that

has flag MTK_SCPD_KEEP_DEFAULT_OFF!

This bug was never experienced by anyone because the HWV domains

never failed probe, and because none of those is declared with the

aforementioned flag - but it's still something critical.

In order to fix this, add a check for MTCMOS Type and, based on

that, call the correct functions for an "is on" check, and also

do the same for the cleanup path, calling the correct functions

for the "power off" action.

For the latter, since there's a

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References