Bug 2440657 (CVE-2026-23228)

Summary: CVE-2026-23228 kernel: smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2026-02-18 16:02:41 UTC 
In the Linux kernel, the following vulnerability has been resolved:

smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()

On kthread_run() failure in ksmbd_tcp_new_connection(), the transport is
freed via free_transport(), which does not decrement active_num_conn,
leaking this counter.

Replace free_transport() with ksmbd_tcp_disconnect().
Comment 1 Alexander B 2026-02-18 18:18:44 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026021807-CVE-2026-23228-647c@gregkh/T