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Unrated severityNVD Advisory· Published Jul 13, 2011· Updated Apr 29, 2026

CVE-2011-1876

CVE-2011-1876

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 CVEs listed in MS11-054, aka "Win32k Use After Free Vulnerability."

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Use-after-free in win32k.sys allows local privilege escalation via crafted application on multiple Windows versions.

Vulnerability

Use-after-free vulnerability in win32k.sys, part of kernel-mode drivers in Microsoft Windows. Affects Windows XP SP2/SP3, Server 2003 SP2, Vista SP1/SP2, Server 2008 Gold/SP2/R2/R2 SP1, Windows 7 Gold/SP1. The bug arises from incorrect driver object management, specifically improper handling of objects leading to use-after-free [1].

Exploitation

An attacker must have valid logon credentials and be able to log on locally. They run a specially crafted application that exploits the use-after-free condition to execute arbitrary code in kernel mode [1][2]. No user interaction required beyond running the app.

Impact

Successful exploitation allows elevation of privilege to SYSTEM, enabling full control of the system. Attacker can install programs, view/change/delete data, or create new accounts [1].

Mitigation

Microsoft released security update MS11-054 (KB2555917) on July 12, 2011, which addresses this vulnerability [1]. Apply via Windows Update or manually. No workarounds mentioned in references. Avaya recommends customers install the update for affected products [2]. US-CERT also recommends applying updates [3].

References
  1. Microsoft Security Bulletin MS11-054 - Important
  2. ASA-2011-202 (KB2555917)
  3. Microsoft Updates for Multiple Vulnerabilities | CISA

AI Insight generated on May 24, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.

Affected products

19
  • Microsoft/Windows Server 20032 versions
    cpe:2.3:o:microsoft:windows_2003_server:*:sp2:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:microsoft:windows_2003_server:*:sp2:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
  • Microsoft/Windows 73 versions
    cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_7:-:sp1:x64:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_7:-:sp1:x86:*:*:*:*:*
  • Microsoft/Windows Server 20088 versions
    cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*+ 7 more
    • cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2008:r2:*:itanium:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2008:r2:*:x64:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2008:-:sp2:itanium:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x32:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x64:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2008:*:*:x32:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:*
  • Microsoft/Windows Vista2 versions
    cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:*
  • Microsoft/Windows Xp2 versions
    cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*+ 1 more
    • cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*
  • Microsoft/Windowsllm-fuzzy
  • Microsoft/win32k.sysllm-fuzzy

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

8

News mentions

0

No linked articles in our index yet.