CVE-2023-3866
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Linux Kernel
PublishedAug 16, 2025
First seenAug 16, 2025
How to fix
Update
- linux linux_kernel5.15.121, 6.1.36, 6.3.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.15 ≤ v < 5.15.121, 5.16 ≤ v < 6.1.36, 6.2 ≤ v < 6.3.10, 6.4 | 5.15.121, 6.1.36, 6.3.10 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.