4.6

CVE-2026-6683

Medienbericht
Exploit

FatFs Divide-by-Zero in exFAT Sync

FatFs R0.16 and earlier contains a divide-by-zero in exFAT sync logic bug when crafted metadata causes n_fatent - 2 to be zero during write/sync operations. This maps to CWE-369 (Divide By Zero). 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). Network-delivered update media can make this remote in some pipelines. The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Partial.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Elm-chan ≫ Fatfs Version <= r0.16
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.43% 0.351
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
44488dab-36db-4358-99f9-bc116477f914 4.6 0.9 3.6
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-369 Divide By Zero

The product divides a value by zero.

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VulnDex Intel
Media Report
03.07.2026 23:46
https://www.runzero.com/blog/fatfs-bugs/
Third Party Advisory
Exploit
https://github.com/runZeroInc/vulns-2026-fatfs-chance
Third Party Advisory
Exploit
https://elm-chan.org/fsw/ff/
Product
https://www.runzero.com/advisories/fatfs-exfat-divide-by-zero-cve-2026-6683
Third Party Advisory