CVE-2026-6685 | ChaN FatFs up to R0.16 f_read sect integer underflow

A vulnerability identified as problematic has been detected in ChaN FatFs up to R0.16. This affects the function f_read. This manipulation of the argument sect causes integer underflow.

The identification of this vulnerability is CVE-2026-6685. It is feasible to perform the attack on the physical device. There is no exploit available.

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