CVE-2026-31572

/// Technical description

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

i2c: designware: amdisp: Fix resume-probe race condition issue

Identified resume-probe race condition in kernel v7.0 with the commit

38fa29b01a6a ("i2c: designware: Combine the init functions"),but this

issue existed from the beginning though not detected.

The amdisp i2c device requires ISP to be in power-on state for probe

to succeed. To meet this requirement, this device is added to genpd

to control ISP power using runtime PM. The pm_runtime_get_sync() called

before i2c_dw_probe() triggers PM resume, which powers on ISP and also

invokes the amdisp i2c runtime resume before the probe completes resulting

in this race condition and a NULL dereferencing issue in v7.0

Fix this race condition by using the genpd APIs directly during probe:

- Call dev_pm_genpd_resume() to Power ON ISP before probe

- Call dev_pm_genpd_suspend() to Power OFF ISP after probe

- Set the device to suspended state with pm_runtime_set_susp

/// 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