---
title: "CVE-2022-0492: Linux Kernel Improper Authentication Vulnerability"
url: https://erroneo.us/security/cve/CVE-2022-0492/
description: "CVE-2022-0492 (Linux Kernel): Exploited in the wild (CISA KEV). A vulnerability was found in the Linux kernel’s cgroupreleaseagentwrite in the…"
type: vulnerability-record
section: "Security Digest"
date_published: 2022-03-03
date_modified: 2026-06-03
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2022-0492"
kev: true
cvss: 7.8
epss: 0.05528
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2022-0492: Linux Kernel Improper Authentication Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Linux Kernel. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-06-02, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-06-05 ; treat that as the outer limit, not the target.
- EPSS 5.5% , percentile 93: FIRST’s model estimates a 5.5% chance of exploitation activity in the next 30 days, higher than 93% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.

## What it is

A vulnerability was found in the Linux kernel’s cgroupreleaseagentwrite in the kernel/cgroup/cgroup-v1.c function. This flaw, under certain circumstances, allows the use of the cgroups v1 releaseagent feature to escalate privileges and bypass the namespace isolation unexpectedly.

## Affected products (CVE record)

- n/a kernel: kernel 5.17 rc3

## Severity

- CISA-ADP CVSS 3.1: 7.8 `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2026-06-02; federal due date 2026-06-05. Known ransomware use: Unknown.
- CISA 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.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 5.53% probability of exploitation activity in the next 30 days; percentile 93.

## Sources

- [DSA-5095](https://www.debian.org/security/2022/dsa-5095)
- [DSA-5096](https://www.debian.org/security/2022/dsa-5096)
- [Listed in CISA KEV notes (git.kernel.org)](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f6008564183aa120d07c03d9289519c2fe02af)
- [Listed in CISA KEV notes (kernel.org)](https://www.kernel.org/)
- [CVE.org record CVE-2022-0492](https://www.cve.org/CVERecord?id=CVE-2022-0492)
- [NVD entry CVE-2022-0492](https://nvd.nist.gov/vuln/detail/CVE-2022-0492)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-0492)
- [bugzilla.redhat.com](https://bugzilla.redhat.com/show_bug.cgi?id=2051505)
- [[debian-lts-announce] 20220309 [SECURITY] [DLA 2940-1] linux security update](https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html)
- [[debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update](https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html)
- [packetstormsecurity.com](http://packetstormsecurity.com/files/166444/Kernel-Live-Patch-Security-Notice-LSN-0085-1.html)
- [security.netapp.com](https://security.netapp.com/advisory/ntap-20220419-0002/)
- [packetstormsecurity.com](http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.html)
- [packetstormsecurity.com](http://packetstormsecurity.com/files/176099/Docker-cgroups-Container-Escape.html)

---
Source page: https://erroneo.us/security/cve/CVE-2022-0492/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt