CVE-2025-40103
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-30

Last updated on: 2026-04-18

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix refcount leak for cifs_sb_tlink Fix three refcount inconsistency issues related to `cifs_sb_tlink`. Comments for `cifs_sb_tlink` state that `cifs_put_tlink()` needs to be called after successful calls to `cifs_sb_tlink()`. Three calls fail to update refcount accordingly, leading to possible resource leaks.
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Meta Information
Published
2025-10-30
Last Modified
2026-04-18
Generated
2026-06-16
AI Q&A
2025-10-30
EPSS Evaluated
2026-06-15
NVD
CVE-2025-40103
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a refcount leak in the Linux kernel's SMB client related to the cifs_sb_tlink structure. Specifically, three calls fail to update the reference count properly, which can lead to resource leaks because the function cifs_put_tlink() is not called as required after successful calls to cifs_sb_tlink().

Impact Analysis

The vulnerability can lead to resource leaks in the system, which may cause degraded performance or instability over time as resources are not properly released.

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