Medium 5.5Published Sep 4, 2025

CVE-2025-38711smb/server: avoid deadlock when linking with ReplaceIfExists

Updated under an hour ago (Oct 27, 2026, 2:23 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: smb/server: avoid deadlock when linking with ReplaceIfExists If smb2_create_link() is called with ReplaceIfExists set and the name does exist then a deadlock will happen. ksmbd_vfs_kern_path_locked() will return with success and the parent directory will be locked. ksmbd_vfs_remove_file() will then remove the file. ksmbd_vfs_link() will then be called while the parent is still locked. It will try to lock the same parent and will deadlock. This patch moves the ksmbd_vfs_kern_path_unlock() call to *before* ksmbd_vfs_link() and then simplifies the code, removing the file_present flag variable.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: May 12, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	0626e6641f6b467447c81dd7678a69c66f7746cf builds before 9d5012ffe14120f978ee34aef4df3d6cb026b7c4; from 0626e6641f6b467447c81dd7678a69c66f7746cf before ac98d54630d5b52e3f684d872f0d82c06c418ea9; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 1e858a7a51c7b8b009d8f246de7ceb7743b44a71; from 0626e6641f6b467447c81dd7678a69c66f7746cf before 814cfdb6358d9b84fcbec9918c8f938cc096a43a; from 0626e6641f6b467447c81dd7678a69c66f7746cf before a7dddd62578c2eb6cb28b8835556a121b5157323; from 0626e6641f6b467447c81dd7678a69c66f7746cf before a726fef6d7d4cfc365d3434e3916dbfe78991a33; from 0626e6641f6b467447c81dd7678a69c66f7746cf before d5fc1400a34b4ea5e8f2ce296ea12bf8c8421694	CNA record
Siemens SIMATIC CN 4100 siemens:simatic_cn_4100 (from the name)	before V5.0	CISA ADP
linux linux_kernel linux:linux_kernel	from 5.15 before 5.15.190; from 5.16 before 6.1.149; from 6.2 before 6.6.103; from 6.7 before 6.12.43; from 6.13 before 6.15.11; from 6.16 before 6.16.2	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/9d5012ffe14120f978ee34aef4df3d6cb026b7c4	patch
https://git.kernel.org/stable/c/ac98d54630d5b52e3f684d872f0d82c06c418ea9	patch
https://git.kernel.org/stable/c/1e858a7a51c7b8b009d8f246de7ceb7743b44a71	patch
https://git.kernel.org/stable/c/814cfdb6358d9b84fcbec9918c8f938cc096a43a	patch
https://git.kernel.org/stable/c/a7dddd62578c2eb6cb28b8835556a121b5157323	patch
https://git.kernel.org/stable/c/a726fef6d7d4cfc365d3434e3916dbfe78991a33	patch
https://git.kernel.org/stable/c/d5fc1400a34b4ea5e8f2ce296ea12bf8c8421694	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	mailing-list, third-party-advisory
https://cert-portal.siemens.com/productcert/html/ssa-032379.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.