CVE-2026-87712: Microsoft Windows QoS Scheduler Driver Elevation of Privilege Vulnerability
Microsoft Windows QoS Scheduler Driver Elevation of Privilege Vulnerability
Other sources
Use after free in Windows Quality of Service (QoS) Packet Scheduler allows an authorized attacker to elevate privileges locally.
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
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Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 6.3.9600.23470Patch KB5126836
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must already be authorized on the affected Windows system and able to execute code locally. The provided information does not indicate that it can be exploited remotely or without prior access.
What is the potential impact of successful exploitation?
Successful exploitation allows local elevation of privilege. The severity vector indicates high impacts to confidentiality, integrity, and availability.
Which systems should be included in remediation scope?
Review systems running Microsoft Windows 10 or Windows 11, and Windows Server 2012, 2012 R2, 2016, 2019, 2022, or 2025. The affected component is the Windows Quality of Service Packet Scheduler.