CVE-2026-23236

kernel: Linux kernel `smscufx` driver: Denial of service via improper ioctl input handling

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Severity

Moderate

Red Hat Product Security

7.3

CVSS 3.1

Review impact separately from score.

Published · March 4, 2026

Updated · August 14, 2026

Description

A flaw was found in the Linux kernel's smscufx driver. A local user could exploit this vulnerability by providing malformed input to the UFX_IOCTL_REPORT_DAMAGE input/output control (ioctl) command. This improper handling of user-supplied data could lead to a system crash, resulting in a denial of service.

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 · 7.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition