CVE-2025-39825
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedSep 16, 2025
First seenSep 16, 2025
How to fix
Update
- linux linux_kernel6.1.150, 6.6.104, 6.12.45, 6.16.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.13 ≤ v < 6.1.150, 6.2 ≤ v < 6.6.104, 6.7 ≤ v < 6.12.45, 6.13 ≤ v < 6.16.5, 6.17 | 6.1.150, 6.6.104, 6.12.45, 6.16.5 |
| debian debian_linux | 11.0 | — |
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