PT-2026-54925

CVE-2026-6683

Published

2026-07-01

Updated

2026-07-06

Description by

CVSS 3.1

4.6

Medium

MetricsAV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions FatFs versions R0.16 and earlier

Description A divide-by-zero issue exists in the exFAT sync logic. This occurs during write or sync operations when crafted metadata causes the calculation n fatent - 2 to result in zero. Divide-by-zero is a condition where a program attempts to divide a number by zero, which typically leads to a system crash or application failure.

Recommendations Update FatFs to a version later than R0.16.

Exploitability

Exploit

Fix

Impacts

Researchers

Hd Moore

Tod Beardsley

Vendors

Affected products

Weakness enumeration

CWE-369: Divide By Zero