Bug 2420290 (CVE-2023-53794)

Summary: CVE-2023-53794 kernel: cifs: fix session state check in reconnect to avoid use-after-free issue
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-12-09 01:06:15 UTC 
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.
Comment 1 Alexander B 2025-12-10 03:49:27 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120941-CVE-2023-53794-8912@gregkh/T