CVE-2026-63936

Summary

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.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/6258bfec51e894ea97b8e69f3cde7af269b37de9
• https://git.kernel.org/stable/c/944082fdb0284a31c0b37a88c8a1d4404da3a6d9
• https://git.kernel.org/stable/c/a72f8e51d6ee66c255a8a93a4421b8a538d112a8
• https://git.kernel.org/stable/c/f9bbd943c34a9ad60e593a4b99ce2394e4e2381b

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