CVE Vulnerabilities

CVE-2021-31166

Use After Free

Published: May 11, 2021 | Modified: Mar 13, 2025
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

HTTP Protocol Stack Remote Code Execution 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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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_2004 Microsoft * 10.0.19041.982 (excluding)
Windows_10_20h2 Microsoft * 10.0.19042.982 (excluding)
Windows_server_2004 Microsoft * 10.0.19041.982 (excluding)
Windows_server_20h2 Microsoft * 10.0.19042.982 (excluding)

Potential Mitigations

References