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CVE-2026-6687

nvd nist
Published: Jul 1, 2026Modified: Jul 2, 2026

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7.6
Vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploitability: 0.9 / Impact: 6.0
Source: 44488dab-36db-4358-99f9-bc116477f914 (Secondary)

Description

FatFs R0.16 and earlier contains a stack overflow bug in f_getlabel() because exFAT label length (XDIR_NumLabel) is trusted without enforcing spec maximums. This maps to CWE-121 (Stack-based Buffer Overflow). 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). The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Total.

Affected (1)

Products: Elm Chan: Fatfs
Elm Chan
1 product
Fatfs
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Fatfs
Up to r0.16

Related CWEs

CWE-121
Stack-based Buffer Overflow
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

References (5)

Source: 44488dab-36db-4358-99f9-bc116477f914
Product
Source: 44488dab-36db-4358-99f9-bc116477f914
Third Party AdvisoryExploit
Source: 44488dab-36db-4358-99f9-bc116477f914
Third Party Advisory
Source: 44488dab-36db-4358-99f9-bc116477f914
Third Party AdvisoryExploit
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Third Party AdvisoryExploit

Timeline

No history available yet.