CVE WatchAug 4, 2026

CVE-2023-3866

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in the compound request This pa

CVSS

7.5

High

EPSS

12.5%

p96

KEV

—

Exploit Today

0-100

Published: Aug 16, 2025 · Last modified: Aug 4, 2026 · CWE-476

EPSS · 30d

11.1%EPSS · 30 days12.5%

2026-09-282026-10-25

Technical 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.

Official references

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