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

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-01-09 · updated 2026-06-17
Weakness: CWE-770

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.

Affected products

Red Hat OpenShift Container Platform 4.18: 3.11, 4.13, 4.14

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
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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