In the Linux kernel, the following vulnerability has been resolved:
ksmbd: validate owner of durable handle on reconnect
Currently, ksmbd does not verify if the user attempting to reconnect
to a durable handle is the same user who originally opened the file.
This allows any authenticated user to hijack an orphaned durable handle
by predicting or brute-forcing the persistent ID.
According to MS-SMB2, the server MUST verify that the SecurityContext
of the reconnect request matches the SecurityContext associated with
the existing open.
Add a durable_owner structure to ksmbd_file to store the original opener's
UID, GID, and account name. and catpure the owner information when a file
handle becomes orphaned. and implementing ksmbd_vfs_compare_durable_owner()
to validate the identity of the requester during SMB2_CREATE (DHnC).
References
Configurations
Configuration 1 (hide)
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History
01 Jun 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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06 May 2026, 21:08
| Type | Values Removed | Values Added |
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| First Time |
Linux
Linux linux Kernel |
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| References | () https://git.kernel.org/stable/c/00ce8d6789dae72d042a4522264964c72891ca37 - Patch | |
| References | () https://git.kernel.org/stable/c/49110a8ce654bbe56bef7c5e44cce31f4b102b8a - Patch | |
| References | () https://git.kernel.org/stable/c/c908c853f304a4969b5aa10eba0b50350cc65b80 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
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| CWE | NVD-CWE-noinfo |
03 May 2026, 07:16
| Type | Values Removed | Values Added |
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| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.8 |
01 May 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-01 14:16
Updated : 2026-06-01 17:16
NVD link : CVE-2026-31717
Mitre link : CVE-2026-31717
CVE.ORG link : CVE-2026-31717
JSON object : View
Products Affected
linux
- linux_kernel
CWE