CVE-2020-8557

unknown

Published 2024-04-24 · Modified 2026-03-03

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CVSS v3

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

CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod. If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node and cause the node to fail.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`1.18.5-1`
sid	Fixed	`1.18.5-1`
forky	Fixed	`1.18.5-1`
bullseye	Fixed	`1.18.5-1`
bookworm	Fixed	`1.18.5-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	k8s.io/kubernetes/pkg/kubelet	`>=1.1.0,<1.16.13`	`1.16.13`
Go	k8s.io/kubernetes/pkg/kubelet	`>=1.17.0,<1.17.9`	`1.17.9`
Go	k8s.io/kubernetes/pkg/kubelet	`>=1.18.0,<1.18.6`	`1.18.6`
Go	k8s.io/kubernetes	`>=1.18.0,<1.18.6`	`1.16.13`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.