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Case File

CVE-2021-4154

HIGH · CVSS 8.8 EPSS 1.21% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-02-04 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.8. It affects Linux. Public exploit code or proof-of-concept references have been detected in its references. It may lead to a denial-of-service condition.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-4154
Severity
HIGH
CVSS
8.8
EPSS
1.21%
Linux

Original NVD Description

A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.

Related CVEs

Other vulnerabilities affecting the same vendor(s)