No exploitation reportedFix available

CVE-2023-6476

Q: Is CVE-2023-6476 actively exploited?

Active exploitation of CVE-2023-6476 has not been confirmed. Its EPSS score was 0.9% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-6476?

CVE-2023-6476 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2024-01-09
Fixed in1.29.1 · 1.28.3 · 1.27.3
WeaknessCWE-770

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2024-01-0922:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-6476?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-6476?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV · NVD

cri-o/cri-o

Branch	Affected	Fixed in	Source
1.29	≥ 1.29.0, < 1.29.1	1.29.1	OSV
1.28	≥ 1.28.0, < 1.28.3	1.28.3	OSV
1.27	< 1.27.3	1.27.3	OSV

Redhat openshift container platformversion to verify

Branch	Affected	Fixed in	Source
3.11	= 3.11	no fix published	NVD
4.13	= 4.13	no fix published	NVD
4.14	= 4.14	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update cri-o/cri-o to 1.29.1 · 1.28.3 · 1.27.3

Advisories and patches

access.redhat.comVendor Advisory
access.redhat.comVendor Advisory
access.redhat.comVendor Advisory
bugzilla.redhat.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-01-10
OpenCVESSVC decisionnone—
CNACVSS 3.16.5read 2026-10-23
NVDCVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-770read 2026-10-23
NVDweakness (CWE)CWE-770read 2026-10-23
FIRST EPSSEPSS score0.9 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2024-01-09
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-6476?

Is CVE-2023-6476 actively exploited?

Active exploitation of CVE-2023-6476 has not been confirmed. Its EPSS score was 0.9% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-6476?

CVE-2023-6476 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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