CVE-2025-38431

kernel: Linux kernel: Denial of Service in SMB client due to native symlink handling

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · July 25, 2025

Updated · June 30, 2026

Description

A flaw was found in the Linux kernel's Server Message Block (SMB) client. A local user could exploit this vulnerability when backup or copy tools interact with native SMB symlinks that the client cannot parse. This issue causes these tools to fail, leading to a denial of service (DoS) for affected operations.

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-59 · Improper Link Resolution Before File Access ('Link Following')