Auth bypass in Linux Linux_kernel
CVE-2022-0492
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…
Vulnerability class: Broken Authentication
EPSS: 0.290 (96.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
- PaloAltoNetworks/can-ctr-escape-cve-2022-0492
- chenaotian/CVE-2022-0492
- SofianeHamlaoui/CVE-2022-0492-Checker
- T1erno/CVE-2022-0492-Docker-Breakout-Checker-and-PoC
- yoeelingBin/CVE-2022-0492-Container-Escape
- smallcat9612/CVE-2022-0492-Docker-Breakout-Checker-and-PoC
- Perimora/cve_2022_0492
- Trinadh465/device_renesas_kernel_AOSP10_r33_CVE-2022-0492
- bb33bb/CVE-2022-0492
- rapid7/metasploit-framework
References
- secalert@redhat.com (Patch, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Patch, Vendor Advisory)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory)
- secalert@redhat.com (VDB Entry, Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (VDB Entry, Third Party Advisory)
- secalert@redhat.com (Exploit, VDB Entry)
Frequently asked questions
- What is CVE-2022-0492?
- CVE-2022-0492 is a high-severity vulnerability in Linux Linux_kernel, classified under Improper Authentication. CVSS score: 7.8/10. Published 2022-03-03.
- How severe is CVE-2022-0492?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2022-0492 known to be exploited?
- Yes. CVE-2022-0492 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-06-02), indicating it is being actively exploited. 64 public proof-of-concept repositories are indexed.