CVE-2023-53358
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-17

Last updated on: 2025-12-12

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix racy issue under cocurrent smb2 tree disconnect There is UAF issue under cocurrent smb2 tree disconnect. This patch introduce TREE_CONN_EXPIRE flags for tcon to avoid cocurrent access.
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Meta Information
Published
2025-09-17
Last Modified
2025-12-12
Generated
2026-06-16
AI Q&A
2025-09-17
EPSS Evaluated
2026-06-14
NVD
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 5.15 (inc) to 5.15.145 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.28 (exc)
linux linux_kernel From 6.2 (inc) to 6.2.15 (exc)
linux linux_kernel From 6.3 (inc) to 6.3.2 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Executive Summary

This vulnerability is a use-after-free (UAF) issue in the Linux kernel's ksmbd component, specifically occurring during concurrent SMB2 tree disconnect operations. The problem arises from a race condition when multiple accesses happen simultaneously, which the patch fixes by introducing TREE_CONN_EXPIRE flags to prevent concurrent access to the tree connection.

Impact Analysis

The use-after-free vulnerability could potentially lead to system instability, crashes, or allow an attacker to execute arbitrary code or cause denial of service by exploiting the race condition during SMB2 tree disconnects.

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