CVE-2022-0492
Linux Kernel Improper Authentication Vulnerability
- Published
- Mar 3, 2022
- Updated
- Jun 3, 2026
- Assigning CNA
- redhat
- Evidence observed
- Jun 2, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 92.7%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
A vulnerability was found in the Linux kernel’s cgroup_release_agent_write in the kernel/cgroup/cgroup-v1.c function. This flaw, under certain circumstances, allows the use of the cgroups v1 release_agent feature to escalate privileges and bypass the namespace isolation unexpectedly.
Sources
modules/exploits/linux/local/docker_cgroup_escape.rb
Metasploit Framework modulesDeclared conditions
- platform: Linux,Unix($.exploit_linux/local/docker_cgroup_escape.platform)
- verification: check_declared($.exploit_linux/local/docker_cgroup_escape.check)
- CVE-2022-0492Exploit
Detailed technical analysis and working exploit for CVE-2022-0492 Linux kernel container escape via cgroup release_agent, with step-by-step lab setup and mitigation guidance.
Responsible use
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