CVE-2026-2636

Katalog CVE

CVSS 5.5 · Medium EPSS 0,43%

Kerentanan Improper Handling of Invalid Use of Special Elements. Skor CVSS 3.1 5.5 (Medium) menurut CNA.

Deskripsi (NVD)

This vulnerability is caused by a CWE‑159: "Improper Handling of Invalid Use of Special Elements" weakness, which leads to an unrecoverable inconsistency in the CLFS.sys driver. This condition forces a call to the KeBugCheckEx function, allowing an unprivileged user to trigger a system crash. Microsoft silently fixed this vulnerability in the September 2025 cumulative update for Windows 11 2024 LTSC and Windows Server 2025. Windows 25H2 (released in September) was released with the patch. Windows 1123h2 and earlier versions remain vulnerable.

Rincian

Terbit di NVD

25 Februari 2026

Terakhir diubah

17 Juni 2026

Status NVD

Deferred

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-159: Improper Handling of Invalid Use of Special Elements

EPSS (30 hari)

0,43% peluang dieksploitasi; lebih tinggi dari 34,9% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://www.fortra.com/security/advisories/research/fr-2026-001