Double free in Microsoft Windows and Windows Server - CVE-2026-112796
Published: November 11, 2026
Vulnerability identifier: #VU164864
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-112796
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges locally and execute code in the security context of the affected service.
The vulnerability exists due to a double free in Windows Event Collector Service when managing dynamically allocated memory. A local user can exploit the repeated freeing of the same memory allocation to execute code with the permissions granted to the service.
Successful exploitation requires a memory allocation to fail at a particular point in the affected operation; this failure cannot be assumed to occur during normal use.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-112796
Install security update from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7846, 10 22H2 10.0.19045.7846, 10 1607 10.0.14393.9688, 10 1809 10.0.17763.9487, 11 23H2 10.0.22631.7711, 11 24H2 10.0.26100.9911, 11 24H2 10.0.26100.9974, 11 25H2 10.0.26200.9911, 11 25H2 10.0.26200.9974, 11 26H1 10.0.28000.3501
Windows Server - addressed in versions 2016 10.0.14393.9688, 2019 10.0.17763.9487, 2022 10.0.20348.5870, 2025 10.0.26100.33730, 2025 10.0.26100.33822
Windows Server - addressed in versions 2016 10.0.14393.9688, 2019 10.0.17763.9487, 2022 10.0.20348.5870, 2025 10.0.26100.33730, 2025 10.0.26100.33822