CVE-2025-39929

kernel: Linux kernel: Denial of Service due to memory leak in SMB client

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · October 4, 2025

Updated · July 30, 2026

Description

A flaw was found in the Linux kernel's Server Message Block (SMB) client. This vulnerability involves a memory leak that occurs during error handling in the smbd_negotiate() function. A local attacker could exploit this flaw to exhaust system resources, leading to a Denial of Service (DoS).

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-772 · Missing Release of Resource after Effective Lifetime