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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于SMB服务器链接操作导致死锁。

AI Predicted 4.0 Difficulty: Moderate EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 0626e6641f6b467447c81dd7678a69c66f7746cf< 9d5012ffe14120f978ee34aef4df3d6cb026b7c4 affected
0626e6641f6b467447c81dd7678a69c66f7746cf< ac98d54630d5b52e3f684d872f0d82c06c418ea9 affected
0626e6641f6b467447c81dd7678a69c66f7746cf< 1e858a7a51c7b8b009d8f246de7ceb7743b44a71 affected
0626e6641f6b467447c81dd7678a69c66f7746cf< 814cfdb6358d9b84fcbec9918c8f938cc096a43a affected
0626e6641f6b467447c81dd7678a69c66f7746cf< a7dddd62578c2eb6cb28b8835556a121b5157323 affected
0626e6641f6b467447c81dd7678a69c66f7746cf< a726fef6d7d4cfc365d3434e3916dbfe78991a33 affected
0626e6641f6b467447c81dd7678a69c66f7746cf< d5fc1400a34b4ea5e8f2ce296ea12bf8c8421694 affected
5.15 affected
… +8 more rows
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I. Basic Information for CVE-2025-38711

Vulnerability Information
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Vulnerability Title
smb/server: avoid deadlock when linking with ReplaceIfExists
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于SMB服务器链接操作导致死锁。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 0626e6641f6b467447c81dd7678a69c66f7746cf ~ 9d5012ffe14120f978ee34aef4df3d6cb026b7c4 -
Linux Linux 5.15 -

II. Public POCs for CVE-2025-38711

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III. Intelligence Information for CVE-2025-38711

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Same Patch Batch · Linux · 2025-09-04 · 52 CVEs total

CVE-2025-38708 9.8 CRITICAL drbd: add missing kref_get in handle_write_conflicts
CVE-2025-38724 9.8 CRITICAL nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm()
CVE-2025-38728 9.1 CRITICAL smb3: fix for slab out of bounds on mount to ksmbd
CVE-2025-38688 8.8 HIGH iommufd: Prevent ALIGN() overflow
CVE-2025-38697 7.8 HIGH jfs: upper bound check of tree index in dbAllocAG
CVE-2025-38722 7.8 HIGH habanalabs: fix UAF in export_dmabuf()
CVE-2025-38685 7.8 HIGH fbdev: Fix vmalloc out-of-bounds write in fast_imageblit
CVE-2025-38718 7.8 HIGH sctp: linearize cloned gso packets in sctp_rcv
CVE-2025-38717 7.8 HIGH net: kcm: Fix race condition in kcm_unattach()
CVE-2025-38715 7.8 HIGH hfs: fix slab-out-of-bounds in hfs_bnode_read()
CVE-2025-38710 7.8 HIGH gfs2: Validate i_depth for exhash directories
CVE-2025-38730 7.8 HIGH io_uring/net: commit partial buffers on retry
CVE-2025-38703 7.8 HIGH drm/xe: Make dma-fences compliant with the safe access rules
CVE-2025-38714 7.8 HIGH hfsplus: fix slab-out-of-bounds in hfsplus_bnode_read()
CVE-2025-38679 7.3 HIGH media: venus: Fix OOB read due to missing payload bound check
CVE-2025-38687 7.3 HIGH comedi: fix race between polling and detaching
CVE-2025-38707 7.1 HIGH fs/ntfs3: Add sanity check for file name
CVE-2025-38713 7.1 HIGH hfsplus: fix slab-out-of-bounds read in hfsplus_uni2asc()
CVE-2025-38692 exfat: add cluster chain loop check for dir
CVE-2025-38695 scsi: lpfc: Check for hdwq null ptr when cleaning up lpfc_vport structure

Showing top 20 of 52 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38711

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