CVE-2026-6685

FatFs CVE-2026-6685 affects FatFs R0.16 and earlier, where a stale dirty-cache skip can occur due to an unsigned-subtraction wrap in f_read() and f_write() during interleaved reads/writes on fragmented filesystems (fp->sect - sect < cc). The root cause is an integer underflow (CWE-191) in t...