4.6

CVE-2026-6684

Medienbericht
Exploit

FatFs Infinite Loop in GPT Partition Scan

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.
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-835 Loop with Unreachable Exit Condition ('Infinite Loop')

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

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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-gpt-scan-loop-dos-cve-2026-6684/
Third Party Advisory