Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Windows and Windows Server - CVE-2024-49046

Vulnerability identifier: #VU100366

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2024-49046

CWE-ID: CWE-367

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to a time-of-check, time-of-use (TOCTOU) race condition in Windows Win32 Kernel Subsystem. A local user can gain elevated privileges on the target system.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.5131, 10 22H2 10.0.19045.5131, 10 1507 10.0.10240.20826, 10 1607 10.0.14393.7515, 10 1809 10.0.17763.6532, 11 22H2 10.0.22621.4460, 11 23H2 10.0.22631.4460, 11 24H2 10.0.26100.2240, 11 24H2 10.0.26100.2314
Windows Server - addressed in versions 2008 R2 6.1.7601.27415, 2008 6.0.6003.22966, 2012 R2 6.3.9600.22267, 2012 6.2.9200.25165, 2022 23H2 10.0.25398.1251, 2022 10.0.20348.2849, 2025 10.0.26100.2240, 2025 10.0.26100.2314

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49046

• Privilege escalation in Microsoft Windows Win32 Kernel Subsystem