CVE-2022-0492

Linux Kernel Improper Authentication Vulnerability

Actively exploited (CISA KEV) High 7.8 CVSS 3.1

Description

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.

Description as published by the source, in English.

Key facts

Published: 2022-03-03
Last modified: 2026-06-17
Assigned by: secalert@redhat.com
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Scored by: nvd@nist.gov (NVD Primary)
Probability of exploitation: 5.5 % higher than 92 % of all known vulnerabilities
EPSS, next 30 days, model v2026.06.15
Fix available: Yes, see references

Actively exploited

CISA added this vulnerability to the Known Exploited Vulnerabilities catalogue on 2026-06-02, with a remediation deadline of 2026-06-05 for US federal agencies.

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.

Affected products

Vendor	Product	Versions	Status
Canonical	Ubuntu Linux	14.04	Affected
Canonical	Ubuntu Linux	16.04	Affected
Canonical	Ubuntu Linux	18.04	Affected
Canonical	Ubuntu Linux	20.04	Affected
Canonical	Ubuntu Linux	22.04	Affected
Debian	Debian Linux	10.0	Affected
Debian	Debian Linux	11.0	Affected
Debian	Debian Linux	9.0	Affected
Fedoraproject	Fedora	35	Affected
Linux	Linux Kernel	5.17	Affected
Linux	Linux Kernel	≥ 2.6.24, < 4.9.301	Affected
Linux	Linux Kernel	≥ 4.10, < 4.14.266	Affected
Linux	Linux Kernel	≥ 4.15, < 4.19.229	Affected
Linux	Linux Kernel	≥ 4.20, < 5.4.177	Affected
Linux	Linux Kernel	≥ 5.11, < 5.15.20	Affected
Linux	Linux Kernel	≥ 5.16, < 5.16.6	Affected
Linux	Linux Kernel	≥ 5.5, < 5.10.97	Affected
Netapp	Bootstrap Os	all versions listed	Affected
Netapp	H300s	all versions listed	Not affected
Netapp	H300s Firmware	all versions listed	Affected
Netapp	H410c	all versions listed	Not affected
Netapp	H410c Firmware	all versions listed	Affected
Netapp	H410s	all versions listed	Not affected
Netapp	H410s Firmware	all versions listed	Affected
Netapp	H500s	all versions listed	Not affected
Netapp	H500s Firmware	all versions listed	Affected
Netapp	H700s	all versions listed	Not affected
Netapp	H700s Firmware	all versions listed	Affected
Netapp	Hci Compute Node	all versions listed	Not affected
Netapp	Solidfire & Hci Management Node	all versions listed	Affected
Netapp	Solidfire, Enterprise Sds & Hci Storage Node	all versions listed	Affected
Redhat	Codeready Linux Builder	8.0	Affected
Redhat	Codeready Linux Builder	8.2	Affected
Redhat	Codeready Linux Builder For Power Little Endian	8.0	Affected
Redhat	Codeready Linux Builder For Power Little Endian	8.2	Affected
Redhat	Enterprise Linux	8.0	Affected
Redhat	Enterprise Linux Eus	8.2	Affected
Redhat	Enterprise Linux For Ibm Z Systems	8.0	Affected
Redhat	Enterprise Linux For Ibm Z Systems Eus	8.0	Affected
Redhat	Enterprise Linux For Power Little Endian	8.0	Affected
Redhat	Enterprise Linux For Power Little Endian Eus	8.0	Affected
Redhat	Enterprise Linux For Real Time For Nfv Tus	8.0	Affected
Redhat	Enterprise Linux For Real Time For Nfv Tus	8.2	Affected
Redhat	Enterprise Linux For Real Time Tus	8.0	Affected
Redhat	Enterprise Linux For Real Time Tus	8.2	Affected
Redhat	Enterprise Linux Server Aus	8.2	Affected
Redhat	Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions	8.1	Affected
Redhat	Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions	8.2	Affected
Redhat	Enterprise Linux Server Tus	8.2	Affected
Redhat	Enterprise Linux Server Update Services For Sap Solutions	8.1	Affected
Redhat	Enterprise Linux Server Update Services For Sap Solutions	8.2	Affected
Redhat	Virtualization Host	4.0	Affected

Weakness type

CWE-862: Missing Authorization
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
CWE-287: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Attack techniques

Derived through the weakness type: CVE to CWE to CAPEC to ATT&CK. This shows which techniques the weakness class is historically used for. It does not assert that this vulnerability has been exploited that way.

T1040: Network Sniffing credential-access, discovery
T1134: Access Token Manipulation stealth, privilege-escalation
T1185: Browser Session Hijacking collection
T1211: Exploitation for Stealth stealth
T1505.003: Web Shell persistence
T1542.002: Component Firmware stealth, persistence
T1548: Abuse Elevation Control Mechanism privilege-escalation
T1550.001: Application Access Token lateral-movement
T1556: Modify Authentication Process defense-impairment, persistence, credential-access
T1557: Adversary-in-the-Middle credential-access, collection
T1563: Remote Service Session Hijacking lateral-movement

References

http://packetstormsecurity.com/files/166444/Kernel-Live-Patch-Security-Notice-LSN-0085-1.… Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.… Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/176099/Docker-cgroups-Container-Escape.html Exploit, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=2051505 Issue Tracking, Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f60085641… Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html Mailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20220419-0002/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5095 Third Party Advisory
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory
http://packetstormsecurity.com/files/166444/Kernel-Live-Patch-Security-Notice-LSN-0085-1.… Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.… Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/176099/Docker-cgroups-Container-Escape.html Exploit, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=2051505 Issue Tracking, Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f60085641… Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html Mailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20220419-0002/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5095 Third Party Advisory
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory

Does this affect you?

A vulnerability matters only if you run the product, in an affected version, somewhere an attacker can reach.

Check your asset list Browse all vulnerabilities

Sources and freshness

CVE

What it is: A reference number naming one specific vulnerability, for example CVE-2024-9474.
What it tells you: Which vulnerability we are talking about, and in which product.
What it does NOT tell you: Nothing about how serious it is, whether anyone is exploiting it, or whether it concerns you.
Why it matters: Without a shared number, vendor, authority and tooling cannot discuss the same flaw.
Used with the others: The number is the key. NVD, KEV and EPSS all describe the same CVE.

NVD CWE CISA KEV EPSS

How to read this together

No single value should be used on its own. A high CVSS score does not mean a vulnerability is being exploited, and a low one does not mean it is harmless. The four sources answer four different questions.

CVE names the specific vulnerability.
NVD adds severity and technical detail about it.
CWE describes the type of mistake behind it.
CISA KEV shows that it is already being exploited.
EPSS estimates how likely exploitation is soon.

The order that decides what is urgent

Do you actually have the product?
Is the version you run affected?
Is it listed in CISA KEV?
Does it have a high EPSS score?
Is the system reachable from the internet or from others?
How important is the system to the business?
Are there compensating controls already in place?

The first two questions are not about the vulnerability at all. They are about you, and they remove most of the list before you start.

A short example

Fix this week

CVSS 6,5 (medium)

In CISA KEV: yes
EPSS: 94 per cent
A firewall facing the internet

Can be scheduled

CVSS 9,8 (critical)

In CISA KEV: no
EPSS: 0,04 per cent
A test server with no internet access

Sorted by CVSS alone, the one on the right comes first. It is the more serious flaw in theory. But the one on the left is being used against real organisations right now, and it sits where an attacker can reach it. That is the one to fix first.

The critical one still has to be fixed. It just does not have to be fixed today.

This product uses the NVD API but is not endorsed or certified by the NVD. CVE and the CVE logo are registered trademarks of The MITRE Corporation; CVE records are used under the CVE Terms of Use. CWE is a trademark of The MITRE Corporation, used per the CWE Terms of Use. KEV data from CISA (CC0). Exploitation probability from EPSS, a FIRST.org project. Open-source package data from OSV and the GitHub Advisory Database (CC-BY 4.0).

Scores and vectors are shown as published by the sources. The ordering of results is Berigo's own editorial assessment, described on the search page, and is not NVD data. An empty result never means a system is safe.