CVE-2026-23427
kernel: ksmbd: fix use-after-free in durable v2 replay of active file handles
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Severity
ImportantRed Hat Product Security
CVSS
Review impact separately from score.
Published · April 3, 2026
Updated · October 20, 2026
Description
A flaw was found in ksmbd, a component within the Linux kernel that provides server message block (SMB) functionality. This vulnerability, known as a use-after-free, occurs when the system attempts to access memory after it has been released. A remote attacker could exploit this by sending specially crafted SMB durable v2 replay requests. Successful exploitation could lead to a system crash, resulting in a denial of service, or potentially allow for arbitrary code execution.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CWE-825 · Expired Pointer Dereference