CVE-2025-9640

Publication date 15 October 2025

Last updated 29 October 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

4.3 · Medium

Score breakdown

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.

Why is this CVE low priority?

Samba developers have rated this a low severity issue

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
samba 25.10 questing
Fixed 2:4.22.3+dfsg-4ubuntu2.1
25.04 plucky
Fixed 2:4.21.4+dfsg-1ubuntu3.5
24.04 LTS noble
Fixed 2:4.19.5+dfsg-4ubuntu9.4
22.04 LTS jammy
Fixed 2:4.15.13+dfsg-0ubuntu1.10
20.04 LTS focal
Fixed 2:4.15.13+dfsg-0ubuntu0.20.04.8+esm1
18.04 LTS bionic
Fixed 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm3
16.04 LTS xenial
Fixed 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm4
14.04 LTS trusty
Fixed 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm15

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Severity score breakdown

Parameter Value
Base score 4.3 · Medium
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

Related Ubuntu Security Notices (USN)

Other references