CVE-2026-98135

kernel: ntfs: reject invalid sectors_per_cluster in the boot sector

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 25, 2026

Updated · October 9, 2026

Description

A flaw was found in the Linux kernel's NTFS file system driver. A local user capable of mounting storage volumes could cause a Denial of Service (DoS) and crash the operating system by mounting a specially crafted NTFS file system image. Due to missing input validation of the cluster configuration in the boot sector, processing the malformed image triggers an invalid bit-shift calculation in the kernel.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-1335 · Incorrect Bitwise Shift of Integer