vulnerability
Red Hat: CVE-2025-39825: kernel: smb: client: fix race with concurrent opens in rename(2) (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:M/Au:S/C:C/I:C/A:C) | Sep 16, 2025 | Nov 14, 2025 | Jan 19, 2026 |
Severity
7
CVSS
(AV:L/AC:M/Au:S/C:C/I:C/A:C)
Published
Sep 16, 2025
Added
Nov 14, 2025
Modified
Jan 19, 2026
Description
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.
Solutions
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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