Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2025-37947

Severity CVSS v4.0:
Pending analysis
Type:
CWE-787 Out-of-bounds Write
Publication date:
20/05/2025
Last modified:
03/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ksmbd: prevent out-of-bounds stream writes by validating *pos<br /> <br /> ksmbd_vfs_stream_write() did not validate whether the write offset<br /> (*pos) was within the bounds of the existing stream data length (v_len).<br /> If *pos was greater than or equal to v_len, this could lead to an<br /> out-of-bounds memory write.<br /> <br /> This patch adds a check to ensure *pos is less than v_len before<br /> proceeding. If the condition fails, -EINVAL is returned.

Impact

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

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
7.80
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools