CVE-2026-2636

MEDIUM

5.5

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung5.5

SchweregradMEDIUM

CVSS VektorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

AngriffsvektorLOCAL

KomplexitatLOW

Erforderliche PrivilegienLOW

BenutzerinteraktionNONE

Veroffentlicht2/25/2026

Zuletzt geandert2/27/2026

Quellenvd

Honeypot-Sichtungen0

Schwachen (CWE)

CWE-159

Referenzen

https://www.fortra.com/security/advisories/research/fr-2026-001(df4dee71-de3a-4139-9588-11b62fe6c0ff)

IOC Korrelationen

Keine Korrelationen erfasst

This product uses data from the NVD API but is not endorsed or certified by the NVD.