CVE-2023-6476
published 2024-01-09CVE-2023-6476: 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…
PriorityP336high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.86%
54.4th percentile
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
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | cri-o_cri-o | >= 0 < 1.27.3 | 1.27.3 |
| github.com | cri-o_cri-o | >= 1.28.0 < 1.28.3 | 1.28.3 |
| github.com | cri-o_cri-o | >= 1.29.0 < 1.29.1 | 1.29.1 |
| msrc | cbl2_cri-o_1.22.3-10_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_cri-o_1.22.3-14_on_cbl_mariner_2.0 | — | — |
| redhat | openshift_container_platform | — | — |
| redhat | openshift_container_platform | — | — |
| redhat | openshift_container_platform | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_msrc6.5MEDIUM
vendor_redhat6.5MEDIUM
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OSV
CRI-O's pods can break out of resource confinement on cgroupv2 in github.com/cri-o/cri-o
osv·2024-06-28
CVE-2023-6476 CRI-O's pods can break out of resource confinement on cgroupv2 in github.com/cri-o/cri-o
CRI-O's pods can break out of resource confinement on cgroupv2 in github.com/cri-o/cri-o
CRI-O's pods can break out of resource confinement on cgroupv2 in github.com/cri-o/cri-o
OSV
CRI-O's pods can break out of resource confinement on cgroupv2
osv·2024-01-10
CVE-2023-6476 [MEDIUM] CRI-O's pods can break out of resource confinement on cgroupv2
CRI-O's pods can break out of resource confinement on cgroupv2
### Impact
_What kind of vulnerability is it? Who is impacted?_
All versions of CRI-O running on cgroupv2 nodes.
Unchecked access to an experimental annotation allows a container to be unconfined. Back in 2021, [support was added](https://github.com/cri-o/cri-o/pull/4479) to support an experimental annotation that allows a user to request special resources in cgroupv2. It was supposed to be gated by an experimental annotation: `io.kubernetes.cri-o.UnifiedCgroup`, which was supposed to be filtered from the [list of allowed annotations](https://github.com/cri-o/cri-o/blob/main/pkg/config/workloads.go#L103-L107) . However, there is a bug in this code which allows any user to specify this annotation, regardless of whether it's ena
GHSA
CRI-O's pods can break out of resource confinement on cgroupv2
ghsa·2024-01-10
CVE-2023-6476 [MEDIUM] CWE-400 CRI-O's pods can break out of resource confinement on cgroupv2
CRI-O's pods can break out of resource confinement on cgroupv2
### Impact
_What kind of vulnerability is it? Who is impacted?_
All versions of CRI-O running on cgroupv2 nodes.
Unchecked access to an experimental annotation allows a container to be unconfined. Back in 2021, [support was added](https://github.com/cri-o/cri-o/pull/4479) to support an experimental annotation that allows a user to request special resources in cgroupv2. It was supposed to be gated by an experimental annotation: `io.kubernetes.cri-o.UnifiedCgroup`, which was supposed to be filtered from the [list of allowed annotations](https://github.com/cri-o/cri-o/blob/main/pkg/config/workloads.go#L103-L107) . However, there is a bug in this code which allows any user to specify this annotation, regardless of whether it's ena
Red Hat
cri-o: Pods are able to break out of resource confinement on cgroupv2
vendor_redhat·2024-01-09·CVSS 6.5
CVE-2023-6476 [MEDIUM] CWE-770 cri-o: Pods are able to break out of resource confinement on cgroupv2
cri-o: Pods are able to break out of resource confinement on cgroupv2
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.
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.
Statement: There are two main factors reduce the severity of this vulnerability to Moderate:
* A potential attacker must already have valid credentials
* The OpenShift environme
Microsoft
Cri-o: pods are able to break out of resource confinement on cgroupv2
vendor_msrc·2024-01-09·CVSS 6.5
CVE-2023-6476 [MEDIUM] CWE-770 Cri-o: pods are able to break out of resource confinement on cgroupv2
Cri-o: pods are able to break out of resource confinement on cgroupv2
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
redhat: redhat
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Referenc
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://access.redhat.com/errata/RHSA-2024:0195https://access.redhat.com/errata/RHSA-2024:0207https://access.redhat.com/security/cve/CVE-2023-6476https://bugzilla.redhat.com/show_bug.cgi?id=2253994https://access.redhat.com/errata/RHSA-2024:0195https://access.redhat.com/errata/RHSA-2024:0207https://access.redhat.com/security/cve/CVE-2023-6476https://bugzilla.redhat.com/show_bug.cgi?id=2253994
2024-01-09
Published