CVE-2020-8569

Name: CVE-2020-8569
Creator: NVD / NIST
Published: 2021-01-21T17:15:14.25+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.27%

Last modified Jun 17, 2026

CVE-2020-8569 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Kubernetes CSI snapshot-controller prior to v2.1.3 and v3.0.2 could panic when processing a VolumeSnapshot custom resource when: - The VolumeSnapshot referenced a non-existing PersistentVolumeClaim and the VolumeSnapshot did not reference any VolumeSnapshotClass. - The snapshot-controller crashes, is automatically restarted by Kubernetes, and processes the same VolumeSnapshot custom resource after the restart, entering an endless crashloop. EPSS estimates a 2.27% chance of exploitation in the next 30 days.

Description

Kubernetes CSI snapshot-controller prior to v2.1.3 and v3.0.2 could panic when processing a VolumeSnapshot custom resource when: - The VolumeSnapshot referenced a non-existing PersistentVolumeClaim and the VolumeSnapshot did not reference any VolumeSnapshotClass. - The snapshot-controller crashes, is automatically restarted by Kubernetes, and processes the same VolumeSnapshot custom resource after the restart, entering an endless crashloop. Only the volume snapshot feature is affected by this vulnerability. When exploited, users can’t take snapshots of their volumes or delete the snapshots. All other Kubernetes functionality is not affected.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.27%

80.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Kubernetes	Container Storage Interface Snapshotter	>= 2.1.0, < 2.1.3
Kubernetes	Container Storage Interface Snapshotter	>= 3.0.0, < 3.0.2

References

https://github.com/kubernetes-csi/external-snapshotter/issues/380Exploit, Third Party Advisory
https://groups.google.com/g/kubernetes-security-announce/c/1EzCr1qUxxUMailing List, Third Party Advisory
https://github.com/kubernetes-csi/external-snapshotter/issues/380Exploit, Third Party Advisory
https://groups.google.com/g/kubernetes-security-announce/c/1EzCr1qUxxUMailing List, Third Party Advisory

Timeline

Published: Jan 21, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8569?

How severe is CVE-2020-8569?

CVE-2020-8569 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.27% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8569?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8569?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST