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Sid 1-48607


OS-WINDOWS Microsoft Windows win32k NtGdiCreateDIBitmapInternal memory corruption attempt


This event is generated when an attacker attempts to exploit a memory corruption vulnerability in Windows win32k.


Attempted User Privilege Gain


CVSS base score 7.8

CVSS impact score 5.9

CVSS exploitability score 1.8

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Detailed information

Rule looks for attempts to exploit a memory corruption vulnerability in Windows win32k. CVE-2018-8639: An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8641.

Affected systems

  • microsoft windows_10 -
  • microsoft windows_10 1607
  • microsoft windows_10 1703
  • microsoft windows_10 1709
  • microsoft windows_10 1803
  • microsoft windows_10 1809
  • microsoft windows_7 -
  • microsoft windows_8.1 -
  • microsoft windowsrt8.1 -
  • microsoft windowsserver2008 -
  • microsoft windowsserver2008 r2
  • microsoft windowsserver2012 -
  • microsoft windowsserver2012 r2
  • microsoft windowsserver2016 -
  • microsoft windowsserver2016 1709
  • microsoft windowsserver2016 1803
  • microsoft windowsserver2019 -

Ease of attack


Access Vector

Access Complexity


False positives

Not known

False negatives

Not known

Corrective action


  • Cisco Talos Intelligence Group

Additional References