Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

Go to Calendar     Go to Press Room     Go to Newsletters subscription

Search

CVE-2023-3866

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
16/08/2025
Last modified:
18/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ksmbd: validate session id and tree id in the compound request<br /> <br /> This patch validate session id and tree id in compound request.<br /> If first operation in the compound is SMB2 ECHO request, ksmbd bypass<br /> session and tree validation. So work-&gt;sess and work-&gt;tcon could be NULL.<br /> If secound request in the compound access work-&gt;sess or tcon, It cause<br /> NULL pointer dereferecing error.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.15 (including) 5.15.121 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 6.1.36 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.3.10 (excluding)
cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:*
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: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:rc7:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools