CVE-2025-9640
October 15, 2025
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.
Affected Packages
https://github.com/samba-team/samba.git (GITHUB):
Affected version(s) >=samba-4.22.0rc1 <samba-4.22.5Fix Suggestion:
Update to version samba-4.22.5https://github.com/samba-team/samba.git (GITHUB):
Affected version(s) >=samba-4.0.0alpha1 <samba-4.21.9Fix Suggestion:
Update to version samba-4.21.9https://github.com/samba-team/samba.git (GITHUB):
Affected version(s) >=samba-4.23.0rc1 <samba-4.23.2Fix Suggestion:
Update to version samba-4.23.2Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Use of Uninitialized Resource
EPSS
Base Score:
0.09
