CVE-2026-2636

MEDIUM

5.5

Descricao

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.

Detalhes CVE

Pontuacao CVSS v3.15.5

SeveridadeMEDIUM

Vetor CVSSCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vetor de ataqueLOCAL

ComplexidadeLOW

Privilegios necessariosLOW

Interacao do usuarioNONE

Publicado2/25/2026

Ultima modificacao2/27/2026

Fontenvd

Avistamentos honeypot0

Fraquezas (CWE)

CWE-159

Referencias

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

Correlacoes IOC

Sem correlacoes registradas

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