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CVE-2025-9640 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CNA: [email protected]CVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://lists.debian.org/debian-lts-announce/2025/11/msg00027.html	CVE
http://www.openwall.com/lists/oss-security/2025/10/15/2	CVE
http://www.openwall.com/lists/oss-security/2025/10/16/2	CVE
https://access.redhat.com/security/cve/CVE-2025-9640	[email protected]	AdvisoryRemedyVendor
https://bugzilla.redhat.com/show_bug.cgi?id=2391698	[email protected]	Issue TrackingTechnical DescriptionVendor
https://www.samba.org/samba/history/security.html	[email protected]	AdvisoryBundleRemedyVendor

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-908	Use of Uninitialized Resource	CISA-ADP
CWE-908	Use of Uninitialized Resource	[email protected]

Affected Products

Product	Versions
Samba	>= 4.0, < 4.16.11 >= 4.0, < 4.17.10 >= 4.0, < 4.18.5
CPE cpe:2.3:a:samba:samba:::::::: Remediation Patch:moderate efforthttps://download.samba.org/pub/samba/ftp/patches/security/samba-4.16.11-security-2023-07-19.patch Patch:moderate efforthttps://download.samba.org/pub/samba/ftp/patches/security/samba-4.17.10-security-2023-07-19.patch Patch:moderate efforthttps://download.samba.org/pub/samba/ftp/patches/security/samba-4.18.5-security-2023-07-19.patch

Product

Versions

Samba

>= 4.0, < 4.16.11

>= 4.0, < 4.17.10

>= 4.0, < 4.18.5

CPE

cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*

Remediation

Patch:moderate efforthttps://download.samba.org/pub/samba/ftp/patches/security/samba-4.16.11-security-2023-07-19.patch
Patch:moderate efforthttps://download.samba.org/pub/samba/ftp/patches/security/samba-4.17.10-security-2023-07-19.patch
Patch:moderate efforthttps://download.samba.org/pub/samba/ftp/patches/security/samba-4.18.5-security-2023-07-19.patch

Change History

13 change records found show changes

Date	Action	Recorded By
Sep 1, 2026	CVE Modified	[email protected]
Aug 31, 2026	CVE Modified	CVE
Aug 31, 2026	CVE Modified	[email protected]
Aug 21, 2026	CVE Modified	[email protected]
Jun 30, 2026	CVE Modified	[email protected]
Jun 25, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
Nov 26, 2025	CVE Modified	CVE
Nov 4, 2025	CVE Modified	CVE
Oct 23, 2025	CVE Modified	[email protected]
Oct 15, 2025	New CVE Received	[email protected]
Oct 15, 2025	CVE Modified	CISA-ADP