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CVE-2023-3866 – Samba ksmbd NULL Pointer Dereference

The following table lists the changes that have been made to the
CVE-2023-3866 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 16, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved:

    ksmbd: validate session id and tree id in the compound request

    This patch validate session id and tree id in compound request.
    If first operation in the compound is SMB2 ECHO request, ksmbd bypass
    session and tree validation. So work->sess and work->tcon could be NULL.
    If secound request in the compound access work->sess or tcon, It cause
    NULL pointer dereferecing error.
    Added Reference https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518e
    Added Reference https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9d
    Added Reference https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0f
    Added Reference https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0
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