CVE-2026-23226

kernel: Linux kernel (ksmbd): Arbitrary code execution due to use-after-free

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Severity

Important

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · February 18, 2026

Updated · August 20, 2026

Description

A flaw was found in the Linux kernel's ksmbd component. A remote attacker could exploit a lack of synchronization in the ksmbd_chann_list xarray during multi-channel sessions. This vulnerability allows for a use-after-free condition, which could lead to arbitrary code execution or 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 · 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-366 · Race Condition within a Thread