CVE-2026-6682

In FatFS R0.16 and earlier contains a FAT32 integer overflow bug in mountvolume where fasize = fs-nfats can wrap, leading to attacker-controlled file-size metadata and unsafe read lengths in downstream callers. This maps to CWE-190 Integer Overflow or Wraparound. Estimated CVSS v3.1 vector:...

CVE-2026-6682 FatFs Integer Overflow in FAT32 Volume Mount

In FatFS R0.16 and earlier contains a FAT32 integer overflow bug in mountvolume where fasize = fs-nfats can wrap, leading to attacker-controlled file-size metadata and unsafe read lengths in downstream callers. This maps to CWE-190 Integer Overflow or Wraparound. Estimated CVSS v3.1 vector:...

PT-2026-54924

Name of the Vulnerable Software and Affected Versions FatFS versions R0.16 and earlier Description An integer overflow occurs in the mount volume function during FAT32 processing when the operation fasize = fs-n fats wraps. This allows an attacker to control file-size metadata, resulting in unsaf...