CVE-2026-93276

/// Technical description

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

phy: renesas: phy-rcar-gen3-usb2: Fix devm action registration for disabled VBUS regulator

devm_regulator_get_exclusive() initialises the regulator with

enable_count = 1, requiring the consumer to disable it before release.

The devm disable action was previously only registered when the caller

explicitly requested enable, so when the regulator was left in its initial

enabled state without an explicit enable call, the cleanup path skipped

decrementing enable_count, triggering a WARN_ON during regulator

release on device removal.

Fix this by always registering the devm disable action based on the actual

enabled state via regulator_is_enabled(), regardless of whether the

caller requested an explicit enable. This covers both the explicitly

enabled case and the initial state set by devm_regulator_get_exclusive().

/// 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