CVE-2021-4083

Updated: 2025-08-20 00:11:52.557654

Description:

A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race condition. This flaw allows a local user to crash the system or escalate their privileges on the system. This flaw affects Linux kernel versions prior to 5.16-rc4.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x MEDIUM 6.9
CVSS Version 3.x HIGH 7.0

Status

OS name Project name Version Score Severity Status Errata Last updated

Statement

AlmaLinux 9.2 ESU kernel 5.14.0 7.0 HIGH Not Vulnerable 2024-04-18 10:10:01
CentOS 6 ELS kernel 2.6.32 7.0 HIGH Released CLSA-2022:1650377052 2022-05-04 13:10:37
CentOS 7 ELS kernel 3.10.0 7.0 HIGH Already Fixed 2024-01-20 08:41:02
CentOS 8.4 ELS kernel 4.18.0 7.0 HIGH Released CLSA-2024:1731430561 2022-04-28 15:59:32
CentOS 8.5 ELS kernel 4.18.0 7.0 HIGH Released CLSA-2024:1731431059 2022-04-28 15:59:01
CentOS Stream 8 ELS kernel 4.18.0 7.0 HIGH Already Fixed 2024-06-09 11:20:37
CloudLinux 6 ELS kernel 2.6.32 7.0 HIGH Released CLSA-2023:1687202317 2024-04-09 11:33:09
CloudLinux 7 ELS kernel 3.10.0 7.0 HIGH Ignored 2025-01-10 22:43:42 CloudLinux 6 and 7 support is limited and provided on demand. We strongly recommend upgrading to Clo...
Oracle Linux 6 ELS kernel 2.6.32 7.0 HIGH Released CLSA-2022:1669850228 2022-11-30 19:56:24
Ubuntu 16.04 ELS linux-hwe 4.15.0 7.0 HIGH Already Fixed 2022-09-28 03:36:15
Total: 12