CVE-2025-9640

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

15/10/2025

Last modified:

26/11/2025

Description

A flaw was found in Samba, in the vfs_streams_xattr module, where uninitialized heap memory could be written into alternate data streams. This allows an authenticated user to read residual memory content that may include sensitive data, resulting in an information disclosure vulnerability.

Impact

Vector 3.x

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

Base Score: 4.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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

Base Score 3.x

4.30

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

https://access.redhat.com/security/cve/CVE-2025-9640
https://bugzilla.redhat.com/show_bug.cgi?id=2391698
https://www.samba.org/samba/history/security.html
http://www.openwall.com/lists/oss-security/2025/10/15/2
http://www.openwall.com/lists/oss-security/2025/10/16/2
https://lists.debian.org/debian-lts-announce/2025/11/msg00027.html