CVE-2021-4028

Updated: 2025-08-20 01:56:10.750054

Description:

A flaw in the Linux kernel's implementation of RDMA communications manager listener code allowed an attacker with local access to setup a socket to listen on a high port allowing for a list element to be used after free. Given the ability to execute code, a local attacker could leverage this use-after-free to crash the system or possibly escalate privileges on the system.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x 0.0
CVSS Version 3.x HIGH 7.8

Status

OS name Project name Version Score Severity Status Errata Last updated

Statement

AlmaLinux 9.2 ESU kernel 5.14.0 7.8 HIGH Already Fixed 2024-01-18 13:09:57
CentOS 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-11-09 13:19:40
CentOS 7 ELS kernel 3.10.0 7.8 HIGH Not Vulnerable 2023-11-03 14:07:33
CentOS 8.4 ELS kernel 4.18.0 7.8 HIGH Released CLSA-2023:1686585068 2023-06-13 09:10:11
CentOS 8.5 ELS kernel 4.18.0 7.8 HIGH Released CLSA-2023:1686651204 2023-06-13 09:10:11
CloudLinux 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-09-15 14:14:16
Oracle Linux 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-11-09 13:19:40
Ubuntu 16.04 ELS linux-hwe 4.15.0 7.8 HIGH Not Vulnerable 2022-10-05 03:15:02
Ubuntu 16.04 ELS linux 4.4.0 7.8 HIGH Released CLSA-2023:1684277390 2023-05-16 21:24:14