CVE-2025-68817

kernel: ksmbd: Use-after-free vulnerability allows arbitrary code execution

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Severity

Important

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · January 13, 2026

Updated · August 21, 2026

Description

A flaw was found in ksmbd in the Linux kernel. This use-after-free vulnerability occurs under high concurrency when a tree-connection object is prematurely freed while still being referenced. A remote attacker could exploit this to execute arbitrary code or cause a denial of service on the system.

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-825 · Expired Pointer Dereference