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    CVE-2025-37899

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in session logoff The sess->user object can currently be in use by another thread, for example if another connection has sent a session setup request to bind to the session being free'd. The handler for that connection could be in the smb2_sess_setup function which makes use of sess->user.

    Published:May 20, 2025
    Last Modified:Jul 30, 2026
    EPS:May 20, 2025
    EPSS Score:0.00472
    CVSS Score:8.8

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    https://news.ycombinator.com/item?id=44081338https://sean.heelan.io/2025/05/22/how-i-used-o3-to-find-cve-2025-37899-a-remote-zeroday-vulnerability-in-the-linux-kernels-smb-implementation/https://github.com/ccss17/o3_finds_cve-2025-37899https://github.com/SeanHeelan/o3_finds_cve-2025-37899https://github.com/vett3x/SMB-LINUX-CVE-2025-37899

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High