CVE-2023-6476

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

HIGH
7.5
CVSS Score
Published: January 9, 2024 at 09:32 PM UTC
Updated: June 17, 2026 at 06:50 AM UTC
2 products affected across 1 vendorOpenShift Container PlatformEnterprise Linux

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Severity
HIGH7.5
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 0:1.26.4-6.1.rhaos4.13.git9eb9cf3.el9 (unaffected)
Vendor states this is fixed in 0:1.27.2-7.rhaos4.14.git1cc7a64.el9 (unaffected)
Vendor states this is fixed in 3.11 (unknown)
redhat-enterprise-linux (environment)
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

VDB Entryx_refsource_REDHATVendor Advisory
https://access.redhat.com/security/cve/CVE-2023-6476
Issue Trackingx_refsource_REDHATVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2253994

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770

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