CVE Vulnerabilities

CVE-2021-34486

Use After Free

Published: Aug 12, 2021 | Modified: Feb 24, 2025
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
4.6 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

Windows Event Tracing Elevation of Privilege Vulnerability

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
Windows_10_1809 Microsoft * 10.0.17763.2114 (excluding)
Windows_10_1909 Microsoft * 10.0.18363.1734 (excluding)
Windows_10_2004 Microsoft * 10.0.19041.1165 (excluding)
Windows_10_20h2 Microsoft * 10.0.19042.1165 (excluding)
Windows_10_21h1 Microsoft * 10.0.19043.1165 (excluding)
Windows_server_2004 Microsoft * 10.0.19041.1165 (excluding)
Windows_server_2019 Microsoft * 10.0.17763.2114 (excluding)
Windows_server_20h2 Microsoft * 10.0.19042.1165 (excluding)

Potential Mitigations

References