CVE-2010-2549

Windows Vista SP1/SP2 and Server 2008 Gold/SP2 - Use-After-Free in LockProcessByClientId

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2010-2549. PoCs published by MSRC.

AI-analyzed exploit summary This exploit demonstrates a use-after-free vulnerability in Windows Vista/Server 2008 via NtUserCheckAccessForIntegrityLevel. The PoC repeatedly calls the undocumented syscall to trigger a refcount leak, leading to a system crash (BSOD).

Description

Use-after-free vulnerability in the kernel-mode drivers in Microsoft Windows Vista SP1 and SP2 and Server 2008 Gold and SP2 allows local users to gain privileges or cause a denial of service (system crash) by using a large number of calls to the NtUserCheckAccessForIntegrityLevel function to trigger a failure in the LockProcessByClientId function, leading to deletion of an in-use process object, aka "Win32k Reference Count Vulnerability."

Exploits (1)

exploitdb WORKING POC VERIFIED
by MSRC · textdoswindows
https://www.exploit-db.com/exploits/14156

This exploit demonstrates a use-after-free vulnerability in Windows Vista/Server 2008 via NtUserCheckAccessForIntegrityLevel. The PoC repeatedly calls the undocumented syscall to trigger a refcount leak, leading to a system crash (BSOD).

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: Windows Vista/Server 2008 (win32k.sys)
No auth needed
Prerequisites: Windows Vista/Server 2008 system · Ability to execute arbitrary code
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (8)

Core 8
Core References
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12215
Exploit mailing-list x_refsource_fulldisc
http://seclists.org/fulldisclosure/2010/Jul/3
Exploit exploit x_refsource_exploit-db
http://www.exploit-db.com/exploits/14156
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/41280
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/40421
US Government Resource third-party-advisory x_refsource_cert
http://www.us-cert.gov/cas/techalerts/TA10-285A.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/66003
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/60120

Scores

EPSS 0.0515
EPSS Percentile 91.4%

Details

CWE
CWE-399
Status published
Products (2)
microsoft/windows_server_2008 (6 CPE variants)
microsoft/windows_vista (2 CPE variants)
Published Jul 02, 2010
Tracked Since Feb 18, 2026