CVE-2026-96853: Windows Win32 Kernel Subsystem Information Disclosure Vulnerability
Time-of-check time-of-use (toctou) race condition in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
Other sources
Windows Win32 Kernel Subsystem Information Disclosure Vulnerability
— 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 10.0.26300.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
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Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.26100.33650Patch KB5126646 - 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 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 6.3.9600.23470Patch KB5126836
Event History
Frequently Asked Questions
What level of access does an attacker need?
Exploitation requires an authorized attacker with local access and low privileges. The attack vector is local, so the provided data does not indicate remote exploitation.
How difficult is exploitation expected to be?
The vulnerability is rated as having high attack complexity. An attacker must successfully exploit a time-of-check time-of-use race condition.
What is the expected security impact?
Successful exploitation can disclose information. The supplied severity vector indicates high confidentiality impact, with no integrity or availability impact.