CVE-2025-39825

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.

CVSS 3.1

4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-25)

CWE

CWE-362

Published

2025-09-16

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• debian:debian_linux
• linux:linux_kernel

References

• https://git.kernel.org/stable/c/24b9ed739c8c5b464d983e12cf308982f3ae93c2
• https://git.kernel.org/stable/c/289f945acb20b9b54fe4d13895e44aa58965ddb2
• https://git.kernel.org/stable/c/c9991af5e09924f6f3b3e6996a5e09f9504b4358
• https://git.kernel.org/stable/c/c9e7de284da0be5b44dbe79d71573f9f7f9b144c
• https://git.kernel.org/stable/c/d84291fc7453df7881a970716f8256273aca5747

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