CVE-2026-74462: i2c: imx: mark I2C adapter when hardware is powered down
In the Linux kernel, the following vulnerability has been resolved:
i2c: imx: mark I2C adapter when hardware is powered down
On some i.MX platforms, certain I2C client drivers keep a periodic workqueue which continues to trigger I2C transfers.
During system suspend/resume, there exists a time window between: - suspendnoirq and the system entering suspend - the system starting to resume and resumenoirq
In this window, the I2C controller resources such as clock and pinctrl may already be disabled or not yet restored.
If a workqueue triggers an I2C transfer in this period, the driver attempts to access I2C registers while the hardware resources are unavailable, which may lead to system hang.
Mark the I2C adapter as suspended during noirq suspend and block new transfers until resume, ensuring that I2C transfers are only issued when hardware resources are available.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
In the i2c: imx code path for noirq suspend/resume, mark the I2C adapter as suspended during noirq suspend and block new I2C transfers until resume so that only transfers issued when hardware resources (e.g., clock/pinctrl) are available can proceed.
Linux kernel i2c-imx driver I2C adapter suspend handling during noirq suspend/resume = Mark I2C adapter as suspended during noirq suspend; block new transfers until resume
Event History
Frequently Asked Questions
What is the severity of CVE-2026-74462?
The severity of CVE-2026-74462 is rated at 18, indicating a high risk.
What is CVE-2026-74462 about?
CVE-2026-74462 addresses an issue in the Linux kernel where I2C adapters may continue operations during hardware power down.
How do I fix CVE-2026-74462?
To fix CVE-2026-74462, update the Linux kernel to a version that includes the security patch for this vulnerability.
Who is affected by CVE-2026-74462?
Users of certain i.MX platforms running vulnerable versions of the Linux kernel are affected by CVE-2026-74462.
What are the potential consequences of CVE-2026-74462?
The potential consequences include unintended I2C transfers during system suspend, potentially leading to data corruption or system instability.