VULNERABILITY INTELLIGENCE

CVE-2026-6682

CVSS score7.6 HIGH
EPSS probability0.32%
CISA KEVNot currently listed
Published2026-07-01
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Description

In FatFS R0.16 and earlier contains a FAT32 integer overflow bug in mount_volume() where fasize *= fs->n_fats 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: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H (7.6, High). Remote delivery is also possible in OTA/update pipelines. The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Total.

Weakness classification

  • 44488dab-36db-4358-99f9-bc116477f914: CWE-190

Primary references