CVE-2025-38306

MediumCVSS 4.7/10Last modified Jul 30, 2026

Description

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).

Metrics

CVSS 3.1 4.7/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-362

Affected software

VendorProductVersions
LinuxLinux>= 620c266f394932e5decc4b34683a75dfc59dc2f4, < 6482c3dccbfb8d20e2856ce67c75856859930b3f; >= 620c266f394932e5decc4b34683a75dfc59dc2f4, < 287c7d34eedd37af1272dfb3b6e8656f4f026424; >= 620c266f394932e5decc4b34683a75dfc59dc2f4, < 1f282cdc1d219c4a557f7009e81bc792820d9d9a
LinuxLinux6.11

References

Timeline

Published
Jul 10, 2025
Last modified
Jul 30, 2026
NVD status
Modified

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CVE-2025-38306: Medium severity, CVSS 4.7 | Vulnix