CVE-2019-0661 — Windows Kernel Information Disclosure Vulnerability

Executive Summary

An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system. An authenticated attacker could exploit this vulnerability by running a specially crafted application. The update addresses the vulnerability by correcting how the Windows kernel handles objects in memory.

Overview

4.7

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

N/A

MS Exploit Likelihood

Category Information Disclosure

Released Feb 12 2019

Last Updated Feb 12 2019

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.02063 — 0.78884 percentile

CVSS Vector

ATTACK VECTOR

Local

ATTACK COMPLEXITY

High

PRIVILEGES REQUIRED

Low

USER INTERACTION

None

SCOPE

Unchanged

Temporal Score: 4.2

EPSS Score

0.02063

probability of exploitation in the next 30 days

0.78884 percentile - updated 2026-06-20

View on FIRST.org

Affected Products

12 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 7 for 32-bit Systems Service Pack 1	`4486563 (Monthly Rollup) 4486564 (Security Only)`	Important	Information Disclosure	Yes
Windows 7 for x64-based Systems Service Pack 1	`4486563 (Monthly Rollup) 4486564 (Security Only)`	Important	Information Disclosure	Yes
Windows Server 2008 for 32-bit Systems Service Pack 2	`4487023 (Monthly Rollup) 4487019 (Security Only)`	Important	Information Disclosure	Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)	`4487023 (Monthly Rollup) 4487019 (Security Only)`	Important	Information Disclosure	Yes
Windows Server 2008 for Itanium-Based Systems Service Pack 2	`4487023 (Monthly Rollup) 4487019 (Security Only)`	Important	Information Disclosure	Yes
Windows Server 2008 for x64-based Systems Service Pack 2	`4487023 (Monthly Rollup) 4487019 (Security Only)`	Important	Information Disclosure	Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)	`4487023 (Monthly Rollup) 4487019 (Security Only)`	Important	Information Disclosure	Yes
Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1	`4486563 (Monthly Rollup) 4486564 (Security Only)`	Important	Information Disclosure	Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1	`4486563 (Monthly Rollup) 4486564 (Security Only)`	Important	Information Disclosure	Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)	`4486563 (Monthly Rollup) 4486564 (Security Only)`	Important	Information Disclosure	Yes
Windows Server 2012	`4487025 (Monthly Rollup) 4486993 (Security Only)`	Important	Information Disclosure	Yes
Windows Server 2012 (Server Core installation)	`4487025 (Monthly Rollup) 4486993 (Security Only)`	Important	Information Disclosure	Yes

Patches

3 patches

Article	Type	Restart
`4486563 (Monthly Rollup) 4486564`	Monthly Rollup	Yes
`4487023 (Monthly Rollup) 4487019`	Monthly Rollup	Yes
`4487025 (Monthly Rollup) 4486993`	Monthly Rollup	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

ZiMi and JunGu of Alibaba Orion Security Lab

References

MSRC Advisory MITRE NVD