CVE-2025-38711
MEDIUMLinux Kernel - Denial of Service via SMB Server Link Deadlock
Title source: llmDescription
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.
References (9)
Core 9
Core References
Third Party Advisory, Mailing List
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-032379.html
Scores
CVSS v3
5.5
EPSS
0.0011
EPSS Percentile
1.6%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-667
Status
published
Products (24)
debian/debian_linux
11.0
linux/Kernel
5.15.0 - 5.15.190linux
linux/Kernel
5.16.0 - 6.1.149linux
linux/Kernel
6.13.0 - 6.15.11linux
linux/Kernel
6.16.0 - 6.16.2linux
linux/Kernel
6.2.0 - 6.6.103linux
linux/Kernel
6.7.0 - 6.12.43linux
Linux/Linux
< 5.15
Linux/Linux
0626e6641f6b467447c81dd7678a69c66f7746cf - 1e858a7a51c7b8b009d8f246de7ceb7743b44a71
Linux/Linux
0626e6641f6b467447c81dd7678a69c66f7746cf - 814cfdb6358d9b84fcbec9918c8f938cc096a43a
... and 14 more
Published
Sep 04, 2025
Tracked Since
Feb 18, 2026