CVEvulnerability

CVE-2018-8639

7.8 HIGH Known exploited Published 2018-12-12 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability — Microsoft Windows

Microsoft Windows Win32k contains an improper resource shutdown or release vulnerability that allows for local, authenticated privilege escalation. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode.

Added to KEV
2025-03-03
Remediation due
2025-03-24
Ransomware use
Known
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2018-8639 ; https://nvd.nist.gov/vuln/detail/CVE-2018-8639
Status
Analyzed
Published
2018-12-12
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
8.4 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
Weaknesses
CWE-404

Description

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 configurations

• microsoft windows 10 1507 • 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 windows rt 8.1 • microsoft windows server 2008 • microsoft windows server 2008 r2 • microsoft windows server 2012 • microsoft windows server 2012 r2 • microsoft windows server 2016 • microsoft windows server 2019

Related

Weakness · CWE (1)

  • CWE-404 Improper Resource Shutdown or Release weakness

References