CVE-2026-63936

/// Technical description

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

iio: adc: mt6359: fix unchecked return value in mt6358_read_imp

In mt6358_read_imp(), the variable val_v is passed to regmap_read()

but the return value is not checked. If the read fails, val_v remains

uninitialized and its random stack content is subsequently reported

as a measurement result.

Initialize val_v to zero to ensure a predictable value is reported

in case of bus failure and to prevent potential stack data leakage.

This also satisfies static analyzers that might otherwise flag the

variable as used uninitialized.

/// 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