4.7

CVE-2025-39825

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.13 < 6.1.150
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.104
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.45
Linux ≫ Linux Kernel Version >= 6.13 < 6.16.5
Linux ≫ Linux Kernel Version6.17 Updaterc1
Debian ≫ Debian Linux Version11.0
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.1% 0.011
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 4.7 1 3.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

https://git.kernel.org/stable/c/c9e7de284da0be5b44dbe79d71573f9f7f9b144c
Patch
https://git.kernel.org/stable/c/24b9ed739c8c5b464d983e12cf308982f3ae93c2
Patch
https://git.kernel.org/stable/c/c9991af5e09924f6f3b3e6996a5e09f9504b4358
Patch
https://git.kernel.org/stable/c/289f945acb20b9b54fe4d13895e44aa58965ddb2
Patch
https://git.kernel.org/stable/c/d84291fc7453df7881a970716f8256273aca5747
Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Third Party Advisory
Mailing List
https://cert-portal.siemens.com/productcert/html/ssa-032379.html