CVE-2026-68464

Technical Description

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

mmc: sdhci-esdhc-imx: disable irq during suspend to fix unhandled interrupt

When using WIFI out-of-band wakeup, an "irq xxx: nobody cared" warning

occurs. This happens because the usdhc interrupt is not disabled during

system suspend when device_may_wakeup() returns false.

The sequence of events leading to this issue:

1. System enters suspend without disabling usdhc interrupt

(because device_may_wakeup() returns false for usdhc device)

2. WIFI out-of-band wakeup triggers system resume via GPIO interrupt

3. WIFI sends a Card interrupt before usdhc has fully resumed

4. usdhc is still in runtime suspend state and cannot handle the

interrupt properly

5. The unhandled interrupt triggers "nobody cared" warning

Fix this by unconditionally disabling the usdhc interrupt during suspend

and re-enabling it during resume, regardless of the wakeup capability.

This ensures no interrupts are processed during the suspend/resume

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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