CVE-2023-3866
ksmbd: validate session id and tree id in the compound request
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.
INFO
Published Date :
Aug. 16, 2025, 2:15 p.m.
Last Modified :
Nov. 18, 2025, 5:58 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel to a patched version.
- Apply security patches provided by the Linux distribution.
- Review and validate session and tree identifiers in requests.
Public PoC/Exploit Available at Github
CVE-2023-3866 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-3866.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-3866 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-3866
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
A collection of links related to Linux kernel security and exploitation
linux-kernel kernel-exploitation exploit privilege-escalation security
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-3866 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-3866 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Nov. 18, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15 up to (excluding) 5.15.121 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.3.10 *cpe:2.3:o:linux:linux_kernel:6.4:rc7:*:*:*:*:*:* Added Reference Type kernel.org: https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 16, 2025
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518e Added Reference https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9d Added Reference https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0f Added Reference https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0