Bug 2395792 (CVE-2025-39825) - CVE-2025-39825 kernel: smb: client: fix race with concurrent opens in rename(2)
Summary: CVE-2025-39825 kernel: smb: client: fix race with concurrent opens in rename(2)
Keywords:
Status: NEW
Alias: CVE-2025-39825
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-09-16 14:02 UTC by OSIDB Bzimport
Modified: 2026-01-14 09:47 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2025:22387 0 None None None 2025-12-01 05:25:32 UTC
Red Hat Product Errata RHSA-2025:22388 0 None None None 2025-12-01 05:58:43 UTC
Red Hat Product Errata RHSA-2025:23425 0 None None None 2025-12-17 03:36:09 UTC
Red Hat Product Errata RHSA-2025:23445 0 None None None 2025-12-17 07:45:28 UTC
Red Hat Product Errata RHSA-2026:0489 0 None None None 2026-01-13 09:28:05 UTC
Red Hat Product Errata RHSA-2026:0532 0 None None None 2026-01-14 00:20:19 UTC
Red Hat Product Errata RHSA-2026:0533 0 None None None 2026-01-14 00:13:38 UTC
Red Hat Product Errata RHSA-2026:0534 0 None None None 2026-01-14 00:09:22 UTC
Red Hat Product Errata RHSA-2026:0535 0 None None None 2026-01-14 00:28:41 UTC
Red Hat Product Errata RHSA-2026:0537 0 None None None 2026-01-14 00:07:26 UTC
Red Hat Product Errata RHSA-2026:0576 0 None None None 2026-01-14 09:47:46 UTC

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
Comment 10 errata-xmlrpc 2026-01-13 09:28:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:0489 https://access.redhat.com/errata/RHSA-2026:0489
Comment 11 errata-xmlrpc 2026-01-14 00:07:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:0537 https://access.redhat.com/errata/RHSA-2026:0537
Comment 12 errata-xmlrpc 2026-01-14 00:09:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:0534 https://access.redhat.com/errata/RHSA-2026:0534
Comment 13 errata-xmlrpc 2026-01-14 00:13:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:0533 https://access.redhat.com/errata/RHSA-2026:0533
Comment 14 errata-xmlrpc 2026-01-14 00:20:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:0532 https://access.redhat.com/errata/RHSA-2026:0532
Comment 15 errata-xmlrpc 2026-01-14 00:28:40 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:0535 https://access.redhat.com/errata/RHSA-2026:0535
Comment 16 errata-xmlrpc 2026-01-14 09:47:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:0576 https://access.redhat.com/errata/RHSA-2026:0576
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