CVE-2026-56643
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Risk Assessment
Risk includes privilege escalation, potentially leading to system instability and unauthorized access.
Recommendation
Apply kernel patches from Microsoft immediately and monitor for anomalies.
Other vulnerabilities in Windows Kernel
See all- CVE-2026-35420High
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
- CVE-2017-11847High
The Windows kernel vulnerability allows an attacker to run arbitrary code in kernel mode, which can lead to installing programs, changing or deleting data, and creating new accounts with full user rights.
- CVE-2017-8561High
The Windows kernel has a privilege escalation vulnerability due to the way it handles objects in memory. This affects multiple versions of Windows, including Windows 8.1, Windows 10, and Windows Server 2016.
- CVE-2026-49798Critical
Use-after-free vulnerability in the Windows kernel allows an unauthorized attacker to elevate privileges locally.
- CVE-2026-45657Critical
A use-after-free vulnerability in the Windows Kernel allows an unauthorized attacker to execute code remotely over a network.
- CVE-2026-40369High
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
- CVE-2026-24289High
A use after free vulnerability in the Windows Kernel allows an authorized attacker to locally elevate privileges.
- CVE-2024-30088HighActively exploited
A vulnerability in the Windows kernel allows elevation of privilege. This flaw can be exploited by a local attacker to gain higher privileges on the system.
- CVE-2024-21371High
Elevation of privilege vulnerability in the Windows kernel. Allows a local attacker to gain elevated privileges.
- CVE-2024-21338HighActively exploited
Elevation of privilege vulnerability in the Windows kernel, allowing an attacker to gain higher privileges on the system.
Original NVD description (English source)
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.