Bug 2395792 (CVE-2025-39825)

Summary:	CVE-2025-39825 kernel: smb: client: fix race with concurrent opens in rename(2)
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2025-09-16 14:02:47 UTC

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix race with concurrent opens in rename(2)

Besides sending the rename request to the server, the rename process
also involves closing any deferred close, waiting for outstanding I/O
to complete as well as marking all existing open handles as deleted to
prevent them from deferring closes, which increases the race window
for potential concurrent opens on the target file.

Fix this by unhashing the dentry in advance to prevent any concurrent
opens on the target.

Comment 1 Keith Grant 2025-09-16 16:29:21 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091616-CVE-2025-39825-8a7a@gregkh/T

Comment 6 errata-xmlrpc 2025-12-01 05:25:31 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:22387 https://access.redhat.com/errata/RHSA-2025:22387

Comment 7 errata-xmlrpc 2025-12-01 05:58:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:22388 https://access.redhat.com/errata/RHSA-2025:22388

Comment 8 errata-xmlrpc 2025-12-17 03:36:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2025:23425 https://access.redhat.com/errata/RHSA-2025:23425

Comment 9 errata-xmlrpc 2025-12-17 07:45:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2025:23445 https://access.redhat.com/errata/RHSA-2025:23445