Information Exposure Affecting kernel-rt-core package, versions <0:4.18.0-348.rt7.130.el8


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.05% (19th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-CENTOS8-KERNELRTCORE-2127415
  • published26 Jul 2021
  • disclosed30 Apr 2021

Introduced: 30 Apr 2021

CVE-2021-31829  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade Centos:8 kernel-rt-core to version 0:4.18.0-348.rt7.130.el8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-core package and not the kernel-rt-core package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.

CVSS Scores

version 3.1