CVE-2025-37899

ksmbd: fix use-after-free in session logoff

EPSS 0.4%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

20 May 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

Affected products

Linux · Linux

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References

https://git.kernel.org/stable/c/02d16046cd11a5c037b28c12ffb818c56dd3ef43 https://git.kernel.org/stable/c/2fc9feff45d92a92cd5f96487655d5be23fb7e2b https://git.kernel.org/stable/c/70ad6455139e26e85f48f95d0e21f351c1909342 https://git.kernel.org/stable/c/931dc8a3670f71c45c0b1379ea4e92dafbda1aca https://git.kernel.org/stable/c/d5ec1d79509b3ee01de02c236f096bc050221b7f https://news.ycombinator.com/item?id=44081338 https://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/