CVE-2023-3866

5.5 mediumEPSS 12%

Medium (5.5) in linux linux kernel. EPSS 12% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.5 medium

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 12% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-10-31)
CWE: CWE-476
Published: 2025-08-16
Modified: 2026-08-04
Record from: the NVD, synced 2026-10-19

Affected

linux:linux_kernel

References

https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518e
https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9d
https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0f
https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0

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