CVE-2026-6685

Severity CVSS v4.0:

Pending analysis

Type:

CWE-191 Integer Underflow (Wrap or Wraparound)

Publication date:

01/07/2026

Last modified:

16/07/2026

Description

Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority following a notification that the vulnerability determination was made in error. After review, the CNA confirmed the erroneous finding. Thanks to David Brown for reaching out about this issue.

Impact

Vector 3.x

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.10 MEDIUM
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Attack Vector (AV): Physical
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): High
Availability (A): High

Base Score 3.x

6.10

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

https://elm-chan.org/fsw/ff/
https://github.com/runZeroInc/vulns-2026-fatfs-chance
https://www.runzero.com/advisories/fatfs-unsigned-sub-wrap-cve-2026-6685/
https://www.runzero.com/blog/fatfs-bugs/
https://github.com/runZeroInc/vulns-2026-fatfs-chance