Privilege escalation in Microsoft Windows Win32 Kernel Subsystem

1) Time-of-check Time-of-use (TOCTOU) Race Condition

EUVDB-ID: #VU100366

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-49046

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: before 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, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131

Windows Server: before 2008 R2 6.1.7601.27415, 2008 6.0.6003.22966, 2012 R2 6.3.9600.22267, 2012 6.2.9200.25165, 2022 10.0.20348.2849, 2022 23H2 10.0.25398.1251, 2025 10.0.26100.2240, 2025 10.0.26100.2314, 2008 R2 6.1.7601.27415, 2008 R2 6.1.7601.27415, 2008 R2 6.1.7601.27415

CPE2.3

• cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows_server:*:*:*:*:*:*:*:

External links

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

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.