Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2025-38306

Severity CVSS v4.0:
Pending analysis
Type:
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Publication date:
10/07/2025
Last modified:
18/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> fs/fhandle.c: fix a race in call of has_locked_children()<br /> <br /> may_decode_fh() is calling has_locked_children() while holding no locks.<br /> That&amp;#39;s an oopsable race...<br /> <br /> The rest of the callers are safe since they are holding namespace_sem and<br /> are guaranteed a positive refcount on the mount in question.<br /> <br /> Rename the current has_locked_children() to __has_locked_children(), make<br /> it static and switch the fs/namespace.c users to it.<br /> <br /> Make has_locked_children() a wrapper for __has_locked_children(), calling<br /> the latter under read_seqlock_excl(&amp;mount_lock).

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 4.70 MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
4.70
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.11 (including) 6.12.46 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.15.3 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools