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Fencer Vulns
medium 6.5

CVE-2023-6476 json

Cri-o: pods are able to break out of resource confinement on cgroupv2

published 2024-01-09 2 y ago modified 2026-06-17 4 mo ago also GHSA-p4rx-7wvg-fwrc , GO-2024-2458 , EUVD-2024-0390

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/cri-o/cri-o 1.27.3, 1.28.3, 1.29.1
  • Red Hat Red Hat OpenShift Container Platform 4.13 0:1.26.4-6.1.rhaos4.13.git9eb9cf3.el9
  • Red Hat Red Hat OpenShift Container Platform 4.14 0:1.27.2-7.rhaos4.14.git1cc7a64.el9
  • cri-o openshift 4.14 1.27.2-7.rhaos4.14.git1cc7a64.el8
  • cri-o openshift 4.14 1.27.2-7.rhaos4.14.git1cc7a64.el9
  • cri-o openshift 4.13 1.26.4-6.1.rhaos4.13.git9eb9cf3.el8
  • cri-o openshift 4.13 1.26.4-6.1.rhaos4.13.git9eb9cf3.el9

red hat advisories RHSA-2024:0207RHSA-2024:0195

  • cri-o CBL-Mariner 2.0 1.22.3-10

azure linux advisories AZL-53405

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-6476 updated cvss 6.5

cri-o: Pods are able to break out of resource confinement on cgroupv2

  • Red Hat OpenShift Container Platform 3.11 cri-o
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 4.13 cri-o 1.26.4-6.1.rhaos4.13.git9eb9cf3.el8, cri-o 1.26.4-6.1.rhaos4.13.git9eb9cf3.el9
    fixed: vendor fix RHSA-2024:0195
  • Red Hat OpenShift Container Platform 4.14 cri-o 1.27.2-7.rhaos4.14.git1cc7a64.el8, cri-o 1.27.2-7.rhaos4.14.git1cc7a64.el9
    fixed: vendor fix RHSA-2024:0207
  • Red Hat OpenShift Container Platform 4.13 perf 5.14.0-284.48.1.el9_2, rtla 5.14.0-284.48.1.el9_2, bpftool 7.0.0-284.48.1.el9_2, kernel 5.14.0-284.48.1.el9_2, kernel-64k 5.14.0-284.48.1.el9_2, kernel-core 5.14.0-284.48.1.el9_2, +71 more Red Hat OpenShift Container Platform 4.14 catch 3.5.1-1.el9, perf 5.14.0-284.48.1.el9_2, rtla 5.14.0-284.48.1.el9_2, bpftool 7.0.0-284.48.1.el9_2, kernel 5.14.0-284.48.1.el9_2, kernel-64k 5.14.0-284.48.1.el9_2, +76 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.86% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/cri-o/cri-o
>=1.29.0, <1.29.1
>=1.28.0, <1.28.3
<1.27.3
1.29.1
1.28.3
1.27.3

Affected products

  • Red Hat Red Hat OpenShift Container Platform 4.13
  • Red Hat Red Hat OpenShift Container Platform 4.14
  • Red Hat Red Hat OpenShift Container Platform 3.11

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.