---
id: "CVE-2026-98904"
kind: "vulnerability"
aliases: ["CVE-2026-98904"]
title: "Linux kernel: i.MX mailbox driver probe ordering fix for runtime PM"
severity: "unknown"
cvss: null
epss: 0.00206
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["imx-mailbox", "linux-kernel", "package"]
not_affected_if: []
published_at: "2026-10-23T12:18:24+00:00"
first_seen_at: "2026-10-23T21:57:33+00:00"
updated_at: "2026-10-25T12:38:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98904", "first_seen_at": "2026-10-23T21:57:33+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-98904", "first_seen_at": "2026-10-25T12:38:50+00:00"}]
---

# Linux kernel: i.MX mailbox driver probe ordering fix for runtime PM

This is a Linux kernel change to the i.MX mailbox driver that moves runtime PM enable and teardown into devm-managed cleanup so the device is not used before probe completes. The sources describe a probe-ordering and resource-cleanup correction, and do not describe an attacker-reachable impact.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T21:57:33+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98904
- 2026-10-25T12:38:50+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-98904

## From the sources

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

mailbox: imx: Use devm_pm_runtime_enable()

sashiko complained about early usage of the device while probe isn't
completed. This can be mitigated by delaying the pm_runtime_enable()
into the removal path instead doing it early. This ensures that in an
error case the device is removed (and imx_mu_shutdown()) before
pm_runtime_disable() so we don't have to do this manually.

For the order to work, lets move devm_mbox_controller_register() until
after the pm-runtime part. So the reverse order will be mbox-controller
removal followed by disabling pm runtime.

Use devm_pm_runtime_enable(), remove manual pm_runtime_disable()
invocations and move the pm_runtime handling in probe before
devm_mbox_controller_register().

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_