---
title: "CVE-2009-3103: Array index error in the SMBv2 protocol… | CubePath"
description: "Array index error in the SMBv2 protocol implementation in srv2.sys in Microsoft Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold and SP2…"
language: en
source: https://cubepath.com/security/cve/CVE-2009-3103
---

# CVE-2009-3103: Array index error in the SMBv2 protocol… | CubePath

## Description

Array index error in the SMBv2 protocol implementation in srv2.sys in Microsoft Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold and SP2, and Windows 7 RC allows remote attackers to execute arbitrary code or cause a denial of service (system crash) via an & (ampersand) character in a Process ID High header field in a NEGOTIATE PROTOCOL REQUEST packet, which triggers an attempted dereference of an out-of-bounds memory location, aka "SMBv2 Negotiation Vulnerability." NOTE: some of these details are obtained from third party information.

Official description from the CVE record, published by microsoft. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2009-3103)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.92347 (92.3% probability)

Percentile

99.8%

Scores of

Nov 10, 2026

Model

v2026.06.15

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [36299](http://www.securityfocus.com/bid/36299)  (securityfocus.com) vdb-entry
- [VU#135940](http://www.kb.cert.org/vuls/id/135940)  (kb.cert.org) third-party-advisory
- [microsoft.com/technet/security/advisory/975497.mspx](http://www.microsoft.com/technet/security/advisory/975497.mspx)
- [reversemode.com/index.php?option=com\_content&task=view&id=6…](http://www.reversemode.com/index.php?option=com%5Fcontent&task=view&id=64&Itemid=1)
- [blog.48bits.com/?p=510](http://blog.48bits.com/?p=510)
- [MS09-050](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-050)  (docs.microsoft.com) vendor-advisory
- [TA09-286A](http://www.us-cert.gov/cas/techalerts/TA09-286A.html)  (us-cert.gov) third-party-advisory
- [isc.sans.org/diary.html?storyid=7093](http://isc.sans.org/diary.html?storyid=7093)
- [36623](http://secunia.com/advisories/36623)  (secunia.com) third-party-advisory
- [g-laurent.blogspot.com/2009/09/windows-vista7-smb20-negotia…](http://g-laurent.blogspot.com/2009/09/windows-vista7-smb20-negotiate-protocol.html)
- [1022848](http://www.securitytracker.com/id?1022848)  (securitytracker.com) vdb-entry
- [20090909 SMB SRV2.SYS Denial of Service PoC](http://www.securityfocus.com/archive/1/506327/100/0/threaded)  (securityfocus.com) mailing-list
- [9594](http://www.exploit-db.com/exploits/9594)  (exploit-db.com) exploit
- [20090907 Windows Vista/7 : SMB2.0 NEGOTIATE PROTOCOL REQUEST Remote B.S.O.D.](http://archives.neohapsis.com/archives/fulldisclosure/2009-09/0090.html)  (archives.neohapsis.com) mailing-list
- [57799](http://osvdb.org/57799)  (osvdb.org) vdb-entry
- [win-srv2sys-code-execution(53090)](https://exchange.xforce.ibmcloud.com/vulnerabilities/53090)  (exchange.xforce.ibmcloud.com) vdb-entry
- [20090908 Regarding Microsoft srv2.sys SMB2.0 NEGOTIATE BSOD](http://www.securityfocus.com/archive/1/506300/100/0/threaded)  (securityfocus.com) mailing-list
- [oval:org.mitre.oval:def:6489](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6489)  (oval.cisecurity.org) vdb-entry signature

## Timeline

1. ID reserved Sep 8, 2009
2. Record published Sep 8, 2009
3. Record last updated Aug 7, 2024

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## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:00 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)