Exploited. On CISA's list since 2026-06-02.

Linux Kernel Improper Authentication Vulnerability

CVE-2022-0492 · Linux Kernel · Published 2022-03-03

How bad would it be?

7.8 out of 10

CVSS rates it high.

How likely is it to be used?

5.5%

Estimated chance of exploitation in the next 30 days, higher than 92% of all scored flaws (EPSS, 2026-10-29).

Is it already being used?

Yes

CISA has seen it exploited in real attacks. For US government agencies the fix is deadline passed 147 days ago (2026-06-05).

What CISA says to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Linux Kernel contains an improper authentication vulnerability which could allow for privilege escalation via the cgroups v1 release_agent feature.

What the flaw is

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.

From the NVD.

Fixes and advisories

bugzilla.redhat.comPatch
git.kernel.orgPatch, Vendor Advisory
bugzilla.redhat.comPatch
git.kernel.orgPatch, Vendor Advisory

Learn this

Explore this week’s weaknesses and all learning topics

Understand the kind of weakness behind this flaw. These resources teach the weakness, rather than reproduce this specific CVE. Follow the vendor's advice above to fix the affected product.

Authentication weaknesses

The application does not reliably check that someone is who they claim to be.

CWE-287 · CISA KEV; NVD record: secalert@redhat.com

Reading and practice labs · Free account for labs. Basic HTTP knowledge; some labs use Burp Suite.

Explore the labs at PortSwigger Web Security Academy How it is prevented

Authorization weaknesses

The application fails to check whether this user may access a resource or perform an action.

CWE-862 · CISA KEV; NVD record: nvd@nist.gov

Reading and practice labs · Free account for labs. Basic HTTP knowledge; some labs use Burp Suite.

Explore the labs at PortSwigger Web Security Academy How it is prevented

CWE is a catalogue of weakness types. Labels come from the sources shown and can differ or change. Resource matches reviewed 16 October 2026.

On SentryFeed

No story in the last 14 days has mentioned it.

Exploited flaws from CISA's KEV catalogue. Chance of exploitation from EPSS by FIRST. Descriptions and scores from the NVD. This product uses the NVD API but is not endorsed or certified by the NVD.