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.
Fix
Patch, vendor advisory and mitigation references on NVD 7
- https://git.kernel.org/stable/c/1e858a7a51c7b8b009d8f246de7ceb7743b44a71 Patch
- https://git.kernel.org/stable/c/814cfdb6358d9b84fcbec9918c8f938cc096a43a Patch
- https://git.kernel.org/stable/c/9d5012ffe14120f978ee34aef4df3d6cb026b7c4 Patch
- https://git.kernel.org/stable/c/a726fef6d7d4cfc365d3434e3916dbfe78991a33 Patch
- https://git.kernel.org/stable/c/a7dddd62578c2eb6cb28b8835556a121b5157323 Patch
- https://git.kernel.org/stable/c/ac98d54630d5b52e3f684d872f0d82c06c418ea9 Patch
- https://git.kernel.org/stable/c/d5fc1400a34b4ea5e8f2ce296ea12bf8c8421694 Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.5 · linux, debianNVD modified 2026-10-19 21:10
Affected (CPE criteria) 2
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
References 9
- https://git.kernel.org/stable/c/1e858a7a51c7b8b009d8f246de7ceb7743b44a71 Patch
- https://git.kernel.org/stable/c/814cfdb6358d9b84fcbec9918c8f938cc096a43a Patch
- https://git.kernel.org/stable/c/9d5012ffe14120f978ee34aef4df3d6cb026b7c4 Patch
- https://git.kernel.org/stable/c/a726fef6d7d4cfc365d3434e3916dbfe78991a33 Patch
- https://git.kernel.org/stable/c/a7dddd62578c2eb6cb28b8835556a121b5157323 Patch
- https://git.kernel.org/stable/c/ac98d54630d5b52e3f684d872f0d82c06c418ea9 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