CVE-2011-1237

Windows XP/Server 2003/Vista/Server 2008/7 Use-After-Free in win32k.sys

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2011-1237. PoCs published by BrunoPujos.

AI-analyzed exploit summary This repository contains a functional proof-of-concept exploit for CVE-2011-1237, a Windows kernel vulnerability involving user-mode callbacks. The exploit leverages a use-after-free condition in win32k.sys to achieve local privilege escalation (LPE) by manipulating window handles and memory allocation.

Description

Use-after-free vulnerability in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows local users to gain privileges via a crafted application that leverages incorrect driver object management, a different vulnerability than other "Vulnerability Type 1" CVEs listed in MS11-034, aka "Win32k Use After Free Vulnerability."

Exploits (1)

nomisec WORKING POC 1 stars
by BrunoPujos · poc
https://github.com/BrunoPujos/CVE-2011-1237

This repository contains a functional proof-of-concept exploit for CVE-2011-1237, a Windows kernel vulnerability involving user-mode callbacks. The exploit leverages a use-after-free condition in win32k.sys to achieve local privilege escalation (LPE) by manipulating window handles and memory allocation.

Classification
Working Poc 90%
Attack Type
Lpe
Complexity
Complex
Reliability
Racy
Target: Microsoft Windows 7 (win32k.sys)
No auth needed
Prerequisites: Local access to a vulnerable Windows 7 system · Ability to execute arbitrary code in user mode
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (11)

Core 11
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/66419
US Government Resource third-party-advisory x_refsource_cert
http://www.us-cert.gov/cas/techalerts/TA11-102A.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/71752
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/47214
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2011/0952
Vendor Advisory x_refsource_confirm
http://support.avaya.com/css/P8/documents/100133352
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12467
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/44156
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id?1025345

Scores

EPSS 0.0269
EPSS Percentile 84.0%

Details

CWE
CWE-399
Status published
Products (7)
microsoft/windows_2003_server
microsoft/windows_7 (3 CPE variants)
microsoft/windows_server_2003
microsoft/windows_server_2008 (6 CPE variants)
microsoft/windows_server_2008 r2 (2 CPE variants)
microsoft/windows_vista (2 CPE variants)
microsoft/windows_xp (2 CPE variants)
Published Apr 13, 2011
Tracked Since Feb 18, 2026