CVE-2021-25741

high

Published 2021-11-01 · Modified 2026-02-04

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CVSS v3

—

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

8.0

Description

A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume, including on the host filesystem.

Predictions

Exploit likelihood

30%

Patch ETA

—

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	—

Arch Fixed 1 release

Version	Status	Fixed in
—	Fixed	`1.22.2-1`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`1.20.5+really1.20.2-1`
sid	Fixed	`1.20.5+really1.20.2-1`
forky	Fixed	`1.20.5+really1.20.2-1`
bullseye	Fixed	`1.20.5+really1.20.2-1`
bookworm	Fixed	`1.20.5+really1.20.2-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	k8s.io/kubernetes	`<1.19.15`	`1.19.15`
Go	k8s.io/kubernetes	`>=1.20.0,<1.20.11`	`1.20.11`
Go	k8s.io/kubernetes	`>=1.21.0,<1.21.5`	`1.21.5`
Go	k8s.io/kubernetes	`>=1.22.0,<1.22.2`	`1.22.2`

References

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

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