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Vulnerabilities
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CVE-2021-3679

Updated on 05 Aug 2021

Severity

5.5 Medium severity

Details

CVSS score
5.5
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.

Details

Affected product:
AlmaLinux 8 , AlmaLinux 9.2 ESU , CentOS 6 , CentOS 6 ALT , CentOS 6 ELS , CentOS 6 plus , CentOS 7 , CentOS 7 ALT , CentOS 7 ELS , CentOS 7 plus , CentOS 8 , CentOS 8.4 ELS , CentOS 8.5 ELS , CloudLinux 6 ELS , CloudLinux OS 6 , CloudLinux OS 6h , CloudLinux OS 7 , CloudLinux OS 7h , CloudLinux OS 8 , Debian 10 , Debian 10 cloud , Debian 9 , Endurance 6 elrepo , Endurance 7 eig 3.10 , Endurance 7 eig 4.14 , OpenVZ 6 , Oracle Linux 6 ELS , Proofpoint , Proxmox VE 5 , Proxmox VE 6 , RHEL 6 , RHEL 7 , RHEL 7 ELS , RHEL 8 , Rocky Linux 8 , Scientific 6 , Ubuntu 14.04 , Ubuntu 14.04 ESM , Ubuntu 16.04 , Ubuntu 16.04 ELS , Ubuntu 16.04 ESM , Ubuntu 18.04 , Ubuntu 18.04 ELS , Ubuntu 20.04 , Upstream 4.14 , Upstream 4.19 , Upstream 4.4 , Upstream 4.9
Affected packages:
linux-hwe @ 4.15.0 (+76 more)
A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.

Fixes