CVE-2026-6686
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
4.6 / 10
Vector String
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Vulnerability Description
FatFs R0.16 and earlier contains an uninitialized cluster exposure when f_lseek() extends files beyond EOF without zero-filling newly allocated clusters. This maps to CWE-908 (Use of Uninitialized Resource). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N (4.6, Medium). The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Partial.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-908
Source
NVD
Vendor
elm-chan
Product
fatfs
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