CVE-2025-38306

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-38306
In the Linux kernel, the following vulnerability has been resolved: fs/fhandle.c: fix a race in call of has_locked_children() may_decode_fh() is calling has_locked_children() while holding no locks. That's an oopsable race... The rest of the callers are safe since they are holding namespace_sem and are guaranteed a positive refcount on the mount in question. Rename the current has_locked_children() to __has_locked_children(), make it static and switch the fs/namespace.c users to it. Make has_locked_children() a wrapper for __has_locked_children(), calling the latter under read_seqlock_excl(&mount_lock).

4.7 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/1f282cdc1d219c4a557f7009e81bc792820d9d9a Patch
https://git.kernel.org/stable/c/287c7d34eedd37af1272dfb3b6e8656f4f026424 Patch
https://git.kernel.org/stable/c/6482c3dccbfb8d20e2856ce67c75856859930b3f Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

18 Nov 2025, 20:41

Type Values Removed Values Added
CWE CWE-362
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/1f282cdc1d219c4a557f7009e81bc792820d9d9a - () https://git.kernel.org/stable/c/1f282cdc1d219c4a557f7009e81bc792820d9d9a - Patch
References () https://git.kernel.org/stable/c/287c7d34eedd37af1272dfb3b6e8656f4f026424 - () https://git.kernel.org/stable/c/287c7d34eedd37af1272dfb3b6e8656f4f026424 - Patch
References () https://git.kernel.org/stable/c/6482c3dccbfb8d20e2856ce67c75856859930b3f - () https://git.kernel.org/stable/c/6482c3dccbfb8d20e2856ce67c75856859930b3f - Patch
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.7

09 Sep 2025, 17:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/6482c3dccbfb8d20e2856ce67c75856859930b3f -

10 Jul 2025, 13:17

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs/fhandle.c: se corrige una ejecución en la llamada a has_locked_children(). may_decode_fh() llama a has_locked_children() sin bloqueos. Esta es una ejecución que puede fallar. El resto de los invocadores están seguros, ya que mantienen namespace_sem y se les garantiza un recuento de referencias positivo en el montaje en cuestión. Cambie el nombre de has_locked_children() actual a __has_locked_children(), conviértalo en estático y cambie los usuarios de fs/namespace.c a él. Convierta has_locked_children() en un contenedor para __has_locked_children(), invocándolo bajo read_seqlock_excl(&mount_lock).

10 Jul 2025, 08:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-07-10 08:15

Updated : 2025-11-18 20:41

NVD link : CVE-2025-38306

Mitre link : CVE-2025-38306

CVE.ORG link : CVE-2025-38306

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')