CVE-2026-85823: Windows Composite Image File System Elevation of Privilege Vulnerability
Use after free in Windows Composite Image File System allows an authorized attacker to elevate privileges locally.
Other sources
Windows Composite Image File System Elevation of Privilege 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
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 10.0.28000.3231Patch KB5127646 - 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 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Systems running the listed Microsoft Windows 11, Windows Server 2025, or Windows Server 2022 products are in scope. Exploitation is local, so the attacker must already have authorized access to the affected system.
What level of access does an attacker need to exploit it?
An attacker needs low privileges on the affected machine. No user interaction is required, but the attack complexity is rated high.
What is the likely impact of successful exploitation?
Successful exploitation can allow local elevation of privilege. The supplied vector rates confidentiality, integrity, and availability impact as high.