CVE-2023-53794
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Publication date: 2025-12-09

Last updated on: 2025-12-09

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: cifs: fix session state check in reconnect to avoid use-after-free issue Don't collect exiting session in smb2_reconnect_server(), because it will be released soon. Note that the exiting session will stay in server->smb_ses_list until it complete the cifs_free_ipc() and logoff() and then delete itself from the list.
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Meta Information
Published
2025-12-09
Last Modified
2025-12-09
Generated
2026-06-16
AI Q&A
2025-12-09
EPSS Evaluated
2026-06-15
NVD
CVE-2023-53794
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a use-after-free issue in the Linux kernel's CIFS (Common Internet File System) implementation. It occurs during the session state check in the reconnect process, where an exiting session is incorrectly collected in smb2_reconnect_server() even though it will be released soon. This can lead to accessing memory that has already been freed.

Impact Analysis

The use-after-free vulnerability could potentially lead to system instability, crashes, or exploitation by attackers to execute arbitrary code or cause denial of service on systems running the affected Linux kernel CIFS implementation.

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