CVE-2026-6686

Katalog CVE

CVSS 4.6 · Medium EPSS 0,26%

Kerentanan Use of Uninitialized Resource pada elm-chan fatfs. Skor CVSS 3.1 4.6 (Medium) menurut CNA.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

1 Juli 2026

Terakhir diubah

2 Juli 2026

Status NVD

Analyzed

CVSS 3.1

4.6 (Medium), sumber CNA
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-908: Use of Uninitialized Resource

EPSS (30 hari)

0,26% peluang dieksploitasi; lebih tinggi dari 15,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/runZeroInc/vulns-2026-fatfs-chance advisory pihak ketiga · exploit
• https://www.runzero.com/advisories/fatfs-uninit-cluster-exposure-cve-2026-6686/ advisory pihak ketiga
• https://www.runzero.com/blog/fatfs-bugs/ advisory pihak ketiga · exploit
• https://elm-chan.org/fsw/ff/ product