Red Hat Enterprise Linux/OpenShift Container Platform Samba vfs_streams_xattr information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Red Hat Enterprise Linux and OpenShift Container Platform. It has been rated as problematic. Affected is the function vfs_streams_xattr of the component Samba. This manipulation causes information disclosure. This vulnerability is tracked as CVE-2025-9640. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Red Hat Enterprise Linux and OpenShift Container Platform (version unknown) and classified as problematic. Affected by this vulnerability is the function vfs_streams_xattr of the component Samba. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The advisory is shared at access.redhat.com. This vulnerability is known as CVE-2025-9640 since 08/29/2025. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/17/2025). MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 270677 (Ubuntu 22.04 LTS / 24.04 LTS / 25.04 / 25.10 : Samba vulnerabilities (USN-7826-1)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (270677) and CERT Bund (WID-SEC-2025-2322). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • SUSE Linux
  • Open Source Samba

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (redhat): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 270677
Nessus Name: Ubuntu 22.04 LTS / 24.04 LTS / 25.04 / 25.10 : Samba vulnerabilities (USN-7826-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/29/2025 CVE reserved
10/15/2025 +47 days Advisory disclosed
10/15/2025 +0 days VulDB entry created
10/17/2025 +2 days VulDB entry last update

Sourcesinfo

Vendor: redhat.com

Advisory: access.redhat.com
Status: Confirmed

CVE: CVE-2025-9640 (🔒)
GCVE (CVE): GCVE-0-2025-9640
GCVE (VulDB): GCVE-100-328657
CERT Bund: WID-SEC-2025-2322 - Samba: Mehrere Schwachstellen

Entryinfo

Created: 10/15/2025 15:27
Updated: 10/17/2025 17:20
Changes: 10/15/2025 15:27 (63), 10/16/2025 19:13 (7), 10/17/2025 17:20 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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