CVE-2021-4159

Published Aug 24, 2022

Last updated 2 years ago

Overview

Description
A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.
Source
secalert@redhat.com
NVD status
Analyzed

Risk scores

CVSS 3.1

Type
Primary
Base score
4.4
Impact score
3.6
Exploitability score
0.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Severity
MEDIUM

Weaknesses

nvd@nist.gov
NVD-CWE-Other
secalert@redhat.com
CWE-202

Social media

Hype score
Not currently trending

Configurations