cvedb.io
CVE-2026-6684
MEDIUM · CVSS 4.6
EPSS exploitation probability: 0%
Published 2026-07-01T15:17:12.553 · Last modified 2026-07-02T14:38:25.923

Summary

FatFs prior to R0.16 that use GPT scanning with 'FF_LBA64 = 1' contains an issue where an unbounded loop count derived from GPT header field GPTH_PtNum, enabling extremely long or effectively infinite mount-time scans. This maps to CWE-835 (Loop with Unreachable Exit Condition). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (4.6, Medium). The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Partial.

Affected products

elm-chan — fatfs

Does this affect you?

Add your gear to cvedb and we'll alert you only when elm-chan ships something exploited.

Check my exposure →

References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.